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【单选题】
作业，为防止吊货大于120°而导致吊货索张力剧增，因此（）A.
降低起货机绞进速度
B.
吊起货物不高
C.
减少吊杆仰角
D.
增加吊杆偏角
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举一反三
【单选题】— Is Mr. Smith in his office now? — No, he _____ there. I _____ him in the library a minute ago. [ ]
A.
may be, saw
B.
can't be, see
C.
mustn't be, see
D.
can't be, saw
【单选题】— Is Mr. Smith in the office? — Yes , he must be there , ________ he is in charge of the office .
A.
since
B.
however
C.
whether
D.
for
【多选题】啤酒花作为啤酒的香料,在啤酒中的作用( )
A.
赋予啤酒特有的酒花香味、爽口的苦味
B.
提高啤酒泡沫的持久性
C.
促进蛋白质沉淀，有利啤酒澄清
D.
酒花有抑菌作用，加入麦汁中能增强麦汁和啤酒的防腐能力
【单选题】—Is Mr. Smith in? —No, he's asked for __________ leave. [ ]
A.
a two week's
B.
a two-week
C.
a two-week's
D.
a two weeks
【单选题】Is Mr. Smith in the office? - Yes,________ he is in charge of the office,he must be there.
A.
since
B.
however
C.
whether
D.
for
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