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【简答题】
钢材中元素 S 主要会使钢的热脆性增大,元素 P 主要会使钢的( ) 增大 .
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A.
Driven
B.
Being driven
C.
To drive
D.
Having driven
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【单选题】The highest rate of skin cancers is found in teenagers who use sun lamps frequently.
A.
Right
B.
Wrong
C.
Not mentioned
【单选题】______________ learning grammar is to use it as frequently as possible.
A.
hoping to
B.
just in time to
C.
The key to
【单选题】All of us thought _________ no use talking about some unpractical matters frequently.
A.
that
B.
it
C.
this
D.
which
【单选题】用一只标准表校验一只电压表,当标准表的电压值为220V时,电压表的示数为220.5V,则被测表的绝对误差为( )伏
A.
-0.5V
B.
0.5V
C.
-1
D.
1
【简答题】A．Consult with her frequently. B．Use the computer regularly. C．Occupy the computer early. D．Wait for one's turn patiently.
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