A transistor radio is sometimes very small.有语法错误么

英语翻译
1.A transistor is constructed by creating a sandwich of differently doped semiconductor layers.The two most common types of transistors,the bipolar-junction transistor (BJT) and the field-effect transistor (FET) are schematically illustrated in Figure 2.1.This figure shows both the silicon structures of these elements and their graphical symbolic representation as would be seen in a circuit diagram.The BJT shown is an NPN transistor,because it is composed of a sandwich of N-P-N doped silicon.When a small current is injected into the base terminal,a larger current is enabled to flow from the collector to the emitter.The FET shown is an N-channel FET,which is composed of two N-type regions separated by a P-type substrate.When a voltage is applied to the insulated gate terminal,a current is enabled to flow from the drain to the source.It is called N-channel,because the gate voltage induces an N-channel within the substrate,enabling current to flow between the N-regions.
2.The type of simulation that is appropriate for a circuit depends on the type of circuit and how you plan to physically implement it.For example,analog,digital and mixed analog/digital circuits to be built as a PCB are,in general,best simulated with SPICE simulation.Digital circuits to be implemented in Programmable Logic Devices are usually simulated at the behavioral language level,most commonly with VHDL or Verilog HDL.For details,see HDLs or the documentation accompanying your VHDL or Verilog product form Electronics Workbench.For very complex digital devices,SPICE models are usually not practical.In these Cases,VHDL or Verilog is the preferred solution for simulating these devices.They can then be included as part of the system-level design by creating a symbol for schematic representation and using the HDL code for simulation models.For details,see HDLs or the documentation accompanying your VHDL or Verilog product from Electronics Workbench.
3.Even the most optimistic semiconductor researchers say that silicon－based computer chips may only have 15 years or so left in them.After that,it will be impossible to fit any more circuits onto these increasingly minute wafers to power inexorably smaller and smarter computers.Consequently,researchers are determined to figure out how to make complex microprocessors out of other materials.IBM made a significant breakthrough in August when physicists at its Thomas J.Watson Research Center,built the world’s first logic circuit out of a single long carbon molecule called a nanotube.Though the first laptop with nanotubes inside is still a long way off,the IBM invention “was a critical step,”says Phaedon Avouris,a member of the group that created the circuit.
如果你是谷歌翻译的，希望经过整理，要通顺的！

英语翻译
1.for your imformation,our transistor radios are selling fast and there have been numerous inquiries for them,please take the necessary steps without delay.
2.the company in question is an importer and wholesaler,here of electric and electronic products,having a business background of some thirty years.
3.we hereby engage with the drawers endorsers and bona,fide holders of bills drawn and presented in accordance with the terms of this credit that the bills shall be duly honored on presentation.
4.the documentary Bill of exchange has been drawn on you at 60 days sight under L/C NO.D234 and has been delivered to the ABC bank.
5.this letter of credit is available by beneficiary's drafts drawn on us in duplicate without recourse at sight of 100% of the invoice value and accompanied by the following shipping documents.

My transistor radio is out of work.It ___.
A.need to be repaired
B.needs to repair
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以前挺会做这种题,现在都忘记了...
可是...还有
C.need repairing
我先排除掉的答案，这又该怎么选

英译汉几句话,电子通信方面
Transistor Q3 has a dual purpose; it performs demodulation of the RF carrier whilst at the same time,amplifying the audio signal.Audio level varies on the strength of the received station but I had typically 10-40mV.This will directly drive high impedance headphones or can be fed into a suitable amplifier.
要求流畅,可以看明白.

几道语法题目,请详解
1.two of the advantages of the transistor are its being bery small in size and its being able to be put close to each other without __
a being overheated b overheating c overheated d having been overheated
2 this furniture is different from __
a that b that one c those d that ones
3.despite his broken leg,bill can walk __around
a good enough to get b well enough getting
c well enough to get d well enough to getting
enough 后面加什么怎么判断
4.a bag of corn was found __
a to be stolen b stolen c being stolen d having stolen
5.the experiment was __easier than we had expected
a more b much more c much d more much
b还是c why?
6.do you consider __wise to ignore him
a it b it would be c it to be d it as being
第5题,什么情况用more ,什么情况much 什么情况 much more 是不是more 加可数名词 ,much 加可数名词或形容词 .much more

my transistor radio isn't working.It_.
A.need repairing B.needs to repair C.needs repairing D.need to repaired

In 1948, three American scientists invented ____ transistor, which is ____ small electronic device to control an electric current. A．the; a B．a; a C．the; the D．a; the

英译汉两句话,电子通信方面
This is a compact three transistor,regenerative receiver with fixed feedback.It is similar in principle to the ZN414 radio IC which is now no longer available.The design is simple and sensitivity and selectivity of the receiver are good.
请翻译的准确流畅一些,不要用翻译机.