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【单选题】
某发电机房工作界噪声测量值为66dB(A),停机后厂界噪声测量值为61dB(A),若标准限值为65dB(A),则该发电机房厂界噪声( )A.
超标
B.
等标
C.
不超标
D.
不确定
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举一反三
【单选题】But for the interruption of endless phone calls, he ________ the report.
A.
would complete
B.
completed
C.
has completed
D.
would have completed
【单选题】____ the interruption, he was able to finish his exercises before the class was over.
A.
Despite of
B.
Instead of
C.
In spite of
D.
Other than
【单选题】欲配制 0.1000 mol · L -1 的 Na 2 CO 3 标准溶液 500.0mL ,问应称取基准 Na 2 CO 3 (M W =105.99 g/mol) 多少克 ?
A.
21.1980 g
B.
5.2995g
C.
0.5300g
D.
2.1198 g
【简答题】Fill in the blanks with the words given below. Change the form where necessary. current outline accomplish target raw routine beneficial proceed ...
【简答题】欲配制0.1000mol.L -1 Na 2 CO 3 溶液150.0ml,应准确称取Na 2 CO 3 的质量为 克。
【单选题】_____ the interruption, he was able to finish exercise before the class was over.
A.
Instead of
B.
Despite of
C.
Because of
D.
In spite of
【单选题】____ the interruption, he was able to finish his exercises before the class was over.
A.
In despite of
B.
Instead of
C.
In spite of
D.
Against
【简答题】欲配制 50.00ml 0.1000mol.L -1 的硼砂溶液,需取 Na 2 B 4 O 7 .10H 2 O 多少克?
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