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【简答题】
《煤矿安全规程》规定采掘工作面进风流中CO2的浓度不得超过( )% 。 A 0.5 B 0.75 C 1.0
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【单选题】Now that we have settled the question of feasibility (可行性), let's proceed to the next one ─_____ raise the fund from the bank. [ ]
A.
whether should we
B.
that we should
C.
whether we should
D.
that should we
【简答题】角点施工高度为 “ + ”为表示 ,施工高度为 “ - ”为表示 。
【单选题】—Whose songs have you been playing? —______ years we played other people's songs, but now we play______ our own songs. [ ]
A.
In, mostly
B.
For, most
C.
For, mostly
D.
In, the most
【简答题】各维修企业的维修单形式各不相同,但主要包括有 四项内容。
【简答题】角点施工高度为“+”为( ),施工高度“-”为( )
【单选题】We have worked for three hours. Now let's stop _________ a rest.
A.
to have
B.
had
C.
have
D.
having
【单选题】We have read f or an hour. Now let's stop ____a rest. [ ]
A.
had
B.
have
C.
to have
D.
having
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