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问题 选择题

Production rose  _____ 10% in April,  ____ the same month of last year.

A in, compared to             B by, compared with 

C in, compared with           D by, comparing to

答案

答案：B

选择题

一个均匀的正方体骰子，要使得任意掷一次，朝上的数字是“2”的可能性占50%，则它的6个面上的数字可能是（　　）

A．1，1，2，2，3，3

B．1，1，2，2，2，3

C．1，2，2，2，2，3

D．1，1，2，3，3，4
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单项选择题

Microwave communication uses high-frequency (56) waves that travel in straightlines through the air. Because the waves cannot (57) with the curvature of the earth, they can be (58) only over short distance. Thus, microwave is a good (59) for sending data between buildings in a city or on a large college campus. For longer distances, the waves must be relayed by means of "dishes" or (60) .These can be installed on towers, high buildings, and mountain tops.

A．reflex

B．distort

C．bend

D．absorb
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