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问题 单项选择题

电力线载波通信中的远动信号占用音频（复用）的哪个频段（）

A.0.3~2.3kHz

B.2.7~3.4kHz

C.5.1~12.2kHz

D.30~200kHz

答案

参考答案：B

完形填空

Mr. Smith liked his job. He liked his town, and he didn’t like the idea of moving somewhere else, but his wife   51  telling him that his pay was not enough to   52     the needs of the family. That was why he was thinking of taking a new job in Boston,  53  he had been offered a job in a factory, and the pay was far   54 .

Henry Manley, boss of Mr. Smith, was the   55  of a small company   56 computers. The company was in   57  trouble, because among other reasons, the Japanese were selling such things at very   58  prices. As a result, Manley had to   59    his own price and profits (利益) as well, otherwise he would not   60  any orders at all. Even so, orders were   61  not coming in fast enough,   62  there was no money for raises for his workers. Somehow, he had to   63  along and keep his   64  workers as well. He sighed (叹气) .    65  then the telephone rang.

His secretary told him that Mr. Smith wanted to   66  him as soon as possible. Manley   67  again. He could   68  what it was about. Mr. Smith was a very young engineer. The company had no   69  unless it could attract men like him. Manley rubbed his forehead: his   70  seemed endless.

小题1:.

A．considered

B．advised

C．began

D．kept小题2:.

A．meet

B．imagine

C．bring

D．tell小题3:.

A．there

B．where

C．here

D．somewhere小题4:.

A．lower

B．more

C．higher

D．less小题5:.

A．secretary

B．manager

C．customer

D．engineer小题6:.

A．making

B．to make

C．made

D．was making小题7:.

A．little

B．its

C．no

D．few小题8:.

A．tall

B．high

C．low

D．short小题9:.

A．raise

B．cut

C．keep

D．hold小题10:.

A．place

B．get

C．give

D．carry out小题11:.

A．already

B．obviously

C．still

D．undoubtedly小题12:.

A．because

B．even if

C．so that

D．even小题13:.

A．walk

B．struggle

C．come

D．give in小题14:.

A．best

B．strongest

C．youngest

D．kindest小题15:.

A．Even

B．Just

C．Suddenly

D．Immediately小题16:.

A．warn

B．leave

C．help

D．see小题17:.

A．waited

B．set back

C．sighed

D．telephoned小题18:.

A．think

B．know

C．expect

D．understand小题19:.

A．future

B．money

C．computers

D．people小题20:.

A．company

B．headache

C．problem

D．question
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单项选择题 A2型题

患者，男，28岁。上腹部灼痛1年，饥饿时加重，进食后可缓解，伴泛酸。查体：上腹部稍偏右有压痛。应首先考虑的是

A．慢性胃炎
B．慢性胆囊炎
C．十二指肠溃疡
D．胰腺炎
E．胃癌
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