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【單選題】
在公式v=v0+at中，涉及到四個物理量，除時間t是標量外，其余三個量v、v0、a是矢量。在直線運動中這三個矢量都在同一條直線上，當取其中一個量的方向為正方向時，其它兩個量的正、負值就有了方向意義。若取初速度v0方向為正，則下列說法中正確的是
A.
勻加速直線運動中，v>0，a<0
B.
勻加速直線運動中，v<0，a>0
C.
勻減速直線運動中，v<0，a>0
D.
勻減速直線運動中，v>0，a<0
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舉報參考答案：
舉一反三
【單選題】When Tom was on his way home from school last night, he got____by two robbers..
A.
robbed
B.
stolen
C.
robbing
D.
stealing
【單選題】To host the Olympics is __________ to win Olympic medals.
A.
as competition much as
B.
much a competition as
C.
as a competition much as
D.
as much a competition as
【單選題】______ quickly, or you’ll be late.
A.
Get dressed
B.
Getting dressed
C.
To get dressed
D.
Dress your clothes
【單選題】He commanded that all the gates __________.
A.
should shut
B.
would be shut
C.
shut
D.
be shut
【單選題】Dream of the Red Chamber is _____ worth _____ because we can learn a lot about the noble families in the feudal society.
A.
very; reading
B.
well; to be read
C.
well; reading
D.
very; to be read
相關題目：
【單選題】When Tom was on his way home from school last night, he got____by two robbers..
A.
robbed
B.
stolen
C.
robbing
D.
stealing
【單選題】To host the Olympics is __________ to win Olympic medals.
A.
as competition much as
B.
much a competition as
C.
as a competition much as
D.
as much a competition as
【單選題】______ quickly, or you’ll be late.
A.
Get dressed
B.
Getting dressed
C.
To get dressed
D.
Dress your clothes
【單選題】He commanded that all the gates __________.
A.
should shut
B.
would be shut
C.
shut
D.
be shut
【單選題】Dream of the Red Chamber is _____ worth _____ because we can learn a lot about the noble families in the feudal society.
A.
very; reading
B.
well; to be read
C.
well; reading
D.
very; to be read
參考解析：
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