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【单选题】
铜包钢承力索的机械强度安全系数不应小于（ ）。A.
（A）2
B.
（B）2.5
C.
（C）3
D.
（D）4
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【单选题】It was ______ that he couldn't finish it alone.
A.
a so difficult work
B.
a so difficult job
C.
such a difficult job
D.
such a difficult work
【简答题】完形填空。 In 1820, it was difficult to make weather maps. Why was it so difficult? It was not easy then to get weather reports 1 . The scientists needed the reports to make the maps. Today it is not diffi...
【单选题】It was______that he couldn't finish it alone.
A.
a so difficult job
B.
so a difficult job
C.
such a difficult job
D.
such difficult a job
【单选题】So far as English is concerned,it is not______ you might think.
A.
so difficult
B.
so difficult as
C.
so much difficult
D.
so difficult that
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