01 词类（I）冠词、并列连接词、数词

• 这台电压表/伏特计如此灵敏,可以测量出电压的微小变化。 This is such ____ sensitive voltmeter…
• 平均速度等于末速度的一半。 The average velocity is about half ____ final velocity. Athe Ba…
• 这个电路由电池、电阻器和电容器组成。 This circuit consists of a battery, a resistor ____ a…
• 原子的中心,即原子核,包含了带正电荷的微粒,称为“质子”。 The center, ____ nucleus, of an at…
• 读者学会这些基本概念很重要,否则后面内容的讨论理解起来会有困难。 It is important for the re…
• 这个电热器消耗的电能比那个电热器多三倍。 This electric heater dissipates ____that one. Ath…
• 月球的质量为地球的八十分之一。 The mass of the moon is ____. A1/80 what the earth is B1/80…
• 温度每上升一度,电容降低百万分之七百五。 The capacitance will decrease by ___________ per e…
• 从1970年至1974年间,晶体管收音机的产量增长了五倍。 From 1970 to 1974, the production of tra…

10 虚拟语气、强调手段、倒装语序

• The order came that the medical supplies ________to Beijing for the H1N1 flu soon. Awould …
• Had the reader known about this computer program, a huge amount of time and energy _______…
• It is important that the number of chirped components on N.() Adepends Bdepend Cdepended D…
• It was after the war was over Einstein was able to come back to his research work again.__…
• Lead is the metal used in pencils.() Avery Bmost Cmuch Dsuch
• It is not clear yet this voltage equals 0.() Awhen it is that Bit is when that Cthat it is…
• In Fig. 2-1 ______ two voltmeters. Ashow Bshows Cis shown Dare shown
• Only when X is less than 1 ______ the inequality ______. Abe … held Bis … held Cdo … ho…
• By an ohmmeter _____ the instrument used to measure resistance. Amean Bmeans Cis meant Dar…
• Not until the end of the 19th century ______ people ______ that the atom was not the small…

09 从句（II）定语从句

• A body velocity is not constant is said to be accelerated.() Awhich Bthat Cwhose Dwho
• Average velocity is defined by the equation v=s/t, v is the average velocity, s is the dis…
• In the analysis of the various types of electronic circuits, the circuits using solid-stat…
• The distance the particle moves in that time is the circumference 2πR of its circular pat…
• the direction in which the body is moving is also important.() AIt was discussed BIt has d…
• A beam of white light is separated into beams of various colors, we conclude that white li…
• This book is a collection of practical transistor circuits, has been tested by the author …
• Within the nucleus is still another tiny globule of matter called the nucleolus, is relate…
• Cohesion is the force like molecules attract each other.() Awith which Btoward which Cin w…
• To dispel this notion is perform a simple experiment.() Aall need do Ball we need do Call …

08 从句（I）状语从句、名词从句、同位语从句

• Small __________ electrons are, they play an important role in the formation of electric c…
• Men are more susceptible to heart disease, __________ women are more prone to develop diab…
• When a body is caused to change its shape, the distorting force is proportional to the amo…
• This has exactly the same form as that describing the diode circuit of Sect. 1.3, with the…
• The question arises __________ this result applies to all cases. Athat Bwhat Cwhether Dwhi…
• If two numbers are to be added, it does not matter __________ order they are added. Awhich…
• Analysis of its spectrum can tell not only __________ atoms or molecules a substance is co…
• __________ we are calculating is the instantaneous acceleration of the particle. AWhat BTh…
• The particular integral is obtained by an application of ___________ the method of undeter…
• This location is indefinitely far from __________ are responsible for the electric field u…

07 动词非谓语形式（II）分词、动名词

• A lamp __________ to a voltage source forms a simple circuit. Aconnect Bconnected Cto conn…
• ___________through a circuit, the current will lose part of its energy. AFlowing BTo flow …
• With the battery terminals ___________, the result will be quite different. Areversing Bis…
• After _______________, the stretched rubber band will return to its original condition. Ah…
• These angles are not necessarily restricted to_________. Abe acute Bacute Cbeing acute Dha…
• Some technical problems___________ are outlined here. Ato remain Bremaining Cbeing remaine…
• It is the net force ____________ the body that causes acceleration. Aacted on Bacting in C…
• ____________, the function becomes much simpler. AThis having been done BDoing this CHavin…
• This problem deserves ____________________. Ato study further Bbeing studied further C fu…
• Air, _______________, may be compressed into a small container. Ais elastic Bbe elastic Ce…

06 动词非谓语形式（I）动词不定式

• It is our purpose in this section to introduce the basic meaning of the solution of a diff…
• To help visualize what is meant by a gravitational field we may use lines of force. 下划线…
• To make it easier for us to take derivatives, we shall square both sides of the expression…
• We call the time to complete one cycle the period of the sinusoid. 下划线部分在句中作。 ()…
• Solar cells enable the power from the sun.() Ato obtain Bof obtaining Cto be obtained Dobt…
• The television camera scans the subject .() Ato transmit Bto be transmitted Cto transmitti…
• Energy is the ability work.() Aof doing Bin doing Cto do Dto be done
• We must find a room .() Awhich puts the instrument Bwhich to put the instrument Cto put th…
• Elasticity may be defined as the tendency an object to return to its original state after …
• It is not apparent the appropriate mesh currents in such cases.() Ato place Bto place wher…

05 比较等级、被动语态及时态

• Convection(对流) is a ______ simpler physical process than conduction. Amore Bmany Cfarthe…
• The temperature of the earth is ______ the deeper you go. Athe highest Bhigh Chigher Dmore…
• Marketing techniques are becoming increasingly ______. Amore sophisticated Bsophisticated …
• Finally, when grouping functions, synchronization overhead should ______ as much as possib…
• Simulation and experimental studies ____, which show that the axial ratio bandwidth of the…
• The existing link security technology ______ to a wireless network to reduce security atta…
• So far we _____ the displacement of a particle.A will consider Bhas considered Chave consi…
• By using the methods of spectral analysis, astronomers ____ to learn a great deal about th…
• This is the first time we ____ this new type of rocket. Ahave ever seen Bhas ever seen Cev…
• We show that a discriminatively trained, multi-layer capsule system achieves state-of-the-…

04 词汇搭配、句子成分

• A simple approach ______ a function(函数)is shown in Fig. Ato express Bto expressing Cin e…
• The variation of g with latitude is due ______ the earth’s rotation. Ain part Bpart to Ci…
• In this case, exposure of the body _____ sunlight helps to overcome anemia and stimulate m…
• The voltage ______ the resistor changes instantaneously, as does the current ______ the re…
• ______ for measuring electric resistance, the ohmmeter is widely used in electrical engine…
• Steady electric current, ______ by the Italian physicist Allessandro Volta (1745-1827), ca…
• Evidence has been piled up ______ specific speech sounds are recognized by babies as young…
• Television, ______ often said, keeps one informed about current events. Ais Bit is Cwhich …
• ______ all other oscillator transfer techniques, the phase-locked mode cannot be used for …

03 词类（III）形容词及副词、代词、名词

• In cellular systems, covering the area is generally divided into a plurality of cells to c…
• Super pixels have emerged as a form of over-segmentation meant to provide clusters of perc…
• In practice, a lot of limitations arise to the correlation of antennas and hardware impair…
• 栅极之所以能做到这点,主要是由于它非常靠近阴极。 The grid is able to do this primarily beca…
• 艾肯机的速度受到了限制,因为它使用的是继电器而不是电子器件。 Aiken’s machine was limited i…
• 由于变压器体积大、重量重、价格昂贵,所以把它们从电路中去掉能节省不少费用。 Since transforme…
• 由于变压器体积大、重量重、价格昂贵,所以把它们从电路中去掉能节省不少费用。 Since transforme…
• 2.5 ______ and 2.6 show two special kinds of robot.() AFig. BFigs. CThe Fig. DThe Figs.
• This ______ must be kept within accepted limits, or the diode will suffer physical damage.…
• A major application of the diode is in the production of a dc voltage from an ac supply, _…

02 词类（II）介词

• These transistor(晶体管) circuits can amplify(放大) voltage signals with minimum waveform …
• The sound-carrying medium may be matter in any state. 下划线介词短语充当______。 A状语 B补…
• The resistance of the load (负载)is too high for the amplifier(放大器). 前后两个下划 线介…
• A circuit may be defined as a path for current flow. 前后两个下划线介词短语分别充当 ______…
• Alternating current(交流电) as a source of power has certain advantages over direct curren…
• _______ further increasing quantum-well(量子阱) number, the increase of the emission energ…
• A simple approach _______ expressing a function(函数) is shown _______ Fig. Aof……by Bo…
• _______ this case the velocity of an object varies linearly (线性地) ________ the time. A…
• We can easily see from the definition (定义) of k _______ the ratio of a force _______ a l…
• The two balls move _______ the opposite directions _______ the same stress(应力). Ain……o…

11 成分省略、分隔现象