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【单选题】
采用万用表测压法检查氧化锆式氧传感器时,当发动机尾气浓时,氧传感器输出电压为( )A.
0.5 ～1V
B.
1 ～1.5V
C.
0.4 ～0.6V
D.
0 ～ 0.1V
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【单选题】Please sweep up all the glass______before anyone steps on them.
A.
chunks
B.
chips
C.
frames
D.
bulks
【单选题】听力原文： It seems so natural to put up an umbrella to keep the water off when it rains. But actually the umbrella was not invented as protection against rain, its first use was as a shade against the sun...
A.
In ancient China.
B.
In ancient Egypt.
C.
In ancient Greece.
D.
In ancient Rome.
【单选题】— Mary looks down today. What's up? — Well, __________ happened between May and It is none of your business. [ ]
A.
anything
B.
no matter what
C.
whatever
D.
everything
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