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【简答题】
铰链四杆机构的杆长依次为 a=60mm,b=200mm,c=100mm,d=90mm 。若杆 c 为机架 , 则此四杆机构为 ________ 。
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举一反三
【单选题】I do believe that ______ swim across the river, but, in that situation, I ____ do that.
A.
am able; couldn’t
B.
could; was able to
C.
was quite able to; couldn’t
D.
couldn’t was able to
【简答题】4. Seldom do I have seen a
situation which made me so angry.
【简答题】He really did nothing practical, for he ____________ (不是看电视就是睡觉).
【简答题】以银行存款4000元购入材料。
【单选题】When Fredy told Pearman to call if he was serious, he meant if ______.
A.
Pearman was really hardworking
B.
Pearman was really looking for a job
C.
Pearman's conditions were truly serious
D.
Pearman was really interested in washing windshields
【简答题】Seldom do I have seen a situation which made me so angry. __________________________________________________________.
【单选题】— The war is very likely to break out in the near future. — I ________, if the situation goes as it is. [ ]
A.
hope so
B.
hope not
C.
am afraid not
D.
am afraid so
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