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【单选题】
对数字多用表的直流电压量程进行检定，按照制造厂规定的办法，由多功能校准器输出10V直流电压加到被校数字多用表，用以检定其20V量程的准确特性。以为多功能校准器输出的10V电压非常稳定，当加到被校数字多用表上后，数字多用表指示的电压值保持不变，故记录的读数只有10.0001V。因此，测量结果的A类标准不确定度分量不评定。 多功能校准器的直流电压功能技术指标表明，经检定合格后在有效期90天内，置信率为 99%时，对应于以上读数的电压不准引入的扩展不确定度为54×10-6V，则该项标准不确定度分量为( )。A.
15.0×10-6V
B.
21.0×10-6V
C.
27.6×10-6V
D.
31.2×10-6V
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【单选题】使用热熔胶进行粘接时,正确的说法是( )
A.
使用时，将热熔胶枪放在手边上，方便拿取。
B.
使用时，不能将热熔胶枪放在手边上，以免被烫伤。
C.
使用完毕后，只要关掉热熔胶枪的开关就可以了。
【单选题】.We waited and waited._________ we had been looking forward to.
A.
Then came the hour
B.
Then did the hour come
C.
The hour came
D.
The hour then came
【单选题】使用热熔胶进行粘接时,错误的说法是( )
A.
使用时，将热熔胶枪放在手边上，方便拿取。
B.
使用时，不能将热熔胶枪放在手边上，以免被烫伤。
C.
使用完毕后，一定要关掉热熔胶枪的开关，并拔出插头。
【单选题】他带我出去吃饭,等饭时却自顾自地查看他的电子邮件。
A.
He take meout for dinner and read his e-mail while we waited for our food.
B.
He takes me out for dinner and reads his e-mail while we waited for our food.
C.
He took me out for dinner and read his e-mail while we waited for our food.
D.
He will take me out for dinner and read his e-mail while we waited for our food.
【简答题】1 沟通中为什么有时要适时并真诚地赞美客户?
【单选题】We waited and waited. ____ we had been looking forward to. [ ]
A.
Then came the moment
B.
Then did the moment come
C.
The moment then came
D.
Then was coming the moment
【单选题】In the following sentence, which is the dependent clause? We played a game while we waited, and then we had dinner.
A.
We played
B.
then we had dinner
C.
while we waited
D.
a game
【单选题】We waited and waited until the wind ____________ and then we started with our trip again.
A.
died away
B.
died out
C.
died down
D.
died off
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