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【单选题】
下列说法正确的是（ ）A.
多项式乘以单项式，积可以是多项式也可以是单项式
B.
多项式乘以单项式，积的次数等于多项式的次数与单项式次数的积
C.
多项式乘以单项式，积的系数是多项式系数与单项式系数的和
D.
多项式乘以单项式，积的项数与多项式的项数相等
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【单选题】Because we can feel that things are heavy, we think of weight as being a fixed quality in an object, but it is not really fixed at all. If you could take a one pound packet of butter 4,000 miles out f...
A.
The Earth Weight
B.
Weight in Space
C.
Changing Weight on the Earth
D.
Weight on and off the Earth
【单选题】We always ______ other people for doing great things; however, we ignore that we can succeed by ourselves.
A.
celebrate
B.
imagine
C.
admire
D.
congratulate
【单选题】Were it not for television, we ______ things that are happening in other places.
A.
can not see
B.
will not see
C.
could not see
D.
did not see
【简答题】DBecause we can feel that things are heavy, we think of weight as being a fixed quality in an object, but it is not really fixed at all. If you could take a one-pound packet of butter 4, 000 miles out...
【简答题】我国隋代的河北（）是世界上现存最早的敞肩式石拱桥。
【简答题】世界上现存最早的敞肩石拱桥是（ ）。
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