皮皮学，免费搜题
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【单选题】
LED不具有的特点是A.
辐射光为相干光
B.
LED的发光颜色非常丰富
C.
LED的单元体积小
D.
寿命长，基本上不需要维修
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【单选题】The football game_______ to an end when it began to rain. [ ]
A.
was approaching
B.
was approached
C.
had approached
D.
approached
【单选题】Since the road is wet this morning, _____ last night.
A.
it must rain
B.
it must be raining
C.
it must have rained
D.
it must have been rain
【单选题】— The weather report says it will rain tomorrow. — _____. It hasn't rained for a long time. [ ]
A.
I hope so
B.
I hope not
C.
That's wrong
D.
I believe not
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