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【判断题】
雷雨天气,即使在室内也不要修理家中的电气线路、开关、插座等。如果一定要修要把家中电源总开关拉开。
A.
正确
B.
错误
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举一反三
【单选题】______ he once felt like giving up, he now has the determination to push further and keep on going.
A.
Where
B.
As
C.
In case
D.
New that
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【简答题】已知| a |=1,| b |=2 , 向量 a 与向量 b 的方向相同,则 a · b =
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【单选题】The same factors push wages and prices up together, the one ______ the other.
A.
emphasizing
B.
reinforcing
C.
multiplying
D.
increasing
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【简答题】已知 a =(-2,2), b =(3,1) ,则与 a +2 b 同向的单位向量为______.
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【简答题】The same factors push wages and prices up together, the one ________ the other. A) emphasizing B) reinforcing C) multiplying D) increasing
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【简答题】已知 a =(1,2), b =(-2,1),则与2 a - b 同向的单位向量是( )。
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【单选题】已知向量a=(1,2,3),则与a方向相同的单位向量是( )
A.
( , , )
B.
(- ,- ,- )
C.
( , , )
D.
(- ,- ,- )
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【简答题】已知a={-1,2,-2},则与a同向的单位向量是( )
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【简答题】句型转换。 l. There is a push-pin. It is holding up this piece of paper. (合并为一句) There is a push-pin_____ _____ this piece of paper. 2. He has a factory. It has a hundred machines. (合并为一句) He has a factory...
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【单选题】已知点A(1,-2),若向量 与向量a=(2,3)同向,且| |= ,则点B的坐标为( )
A.
(2,3)
B.
(-2,3)
C.
(3,1)
D.
(3,-1)
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相关题目:
【单选题】______ he once felt like giving up, he now has the determination to push further and keep on going.
A.
Where
B.
As
C.
In case
D.
New that
查看完整题目与答案
【简答题】已知| a |=1,| b |=2 , 向量 a 与向量 b 的方向相同,则 a · b =
查看完整题目与答案
【单选题】The same factors push wages and prices up together, the one ______ the other.
A.
emphasizing
B.
reinforcing
C.
multiplying
D.
increasing
查看完整题目与答案
【简答题】已知 a =(-2,2), b =(3,1) ,则与 a +2 b 同向的单位向量为______.
查看完整题目与答案
【简答题】The same factors push wages and prices up together, the one ________ the other. A) emphasizing B) reinforcing C) multiplying D) increasing
查看完整题目与答案
【简答题】已知 a =(1,2), b =(-2,1),则与2 a - b 同向的单位向量是( )。
查看完整题目与答案
【单选题】已知向量a=(1,2,3),则与a方向相同的单位向量是( )
A.
( , , )
B.
(- ,- ,- )
C.
( , , )
D.
(- ,- ,- )
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【简答题】已知a={-1,2,-2},则与a同向的单位向量是( )
查看完整题目与答案
【简答题】句型转换。 l. There is a push-pin. It is holding up this piece of paper. (合并为一句) There is a push-pin_____ _____ this piece of paper. 2. He has a factory. It has a hundred machines. (合并为一句) He has a factory...
查看完整题目与答案
【单选题】已知点A(1,-2),若向量 与向量a=(2,3)同向,且| |= ,则点B的坐标为( )
A.
(2,3)
B.
(-2,3)
C.
(3,1)
D.
(3,-1)
查看完整题目与答案