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【单选题】
对于直动推杆盘形凸轮机构来讲,在其他条件相同的情况下,偏置直动推杆与对心直动推杆相比,两者在推最大压力角的关系为 关系。A.
偏置比对心大
B.
对心比偏置大
C.
一样大
D.
不一定
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【简答题】Believe it or not, when first (introduce) ______ to Europe, tomato was thought to be poisonous.
【单选题】Of course I will help when Dee goes to see her first movie. (Para. 8) . I would certainly like to be on hand when Dee goes to see her first movie.
A.
I would be very glad to accompany Dee when she goes to see her first movie
B.
I would certainly like to be on hand when Dee goes to see her first movie.
【简答题】Believe it or not, when first (introduce) ______ to Europe, tomato was thought to be poisonous.
【单选题】When first ________ to the market, the computer software ． was not a success due to its complexity in operation.
A.
introducing
B.
being introduced
C.
introduced
D.
to be introduced
【单选题】When Europeans first came to Africa, they were amazed to find that many Africans had more than one wife. Because of this practice, many people thought that African men treated women like waves. But th...
A.
interesting
B.
satisfied
C.
surprised
D.
shocked
【简答题】在饼层过滤中，真正发挥拦截颗粒作用的主要是( )而不是( )。
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【简答题】Believe it or not, when first (introduce) ______ to Europe, tomato was thought to be poisonous.
【简答题】Believe it or not, when first (introduce) ______ to Europe, tomato was thought to be poisonous.