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【多选题】
物体以速度v匀速通过直线上的A、B两点,所用时间为t;现在物体从A点由静止出发,先匀加速直线运动(加速度为a 1 )到某一最大速度v m 后立即做匀减速直线运动(加速度大小为a 2 )至B点速度恰好减为0,所用时间仍为t。则物体的()
A.
v m 只能为2v,与a 1 、a 2 的大小无关
B.
v m 可为许多值,与a 1 、a 2 的大小有关
C.
a 1 、a 2 一定的
D.
a 1 、a 2 必须满足
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参考答案:
举一反三
【单选题】Be at all times。
A.
neat
B.
near
C.
never
D.
new
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【判断题】In all construction areas, hard hat must be worn at all times.
A.
正确
B.
错误
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【单选题】用边界值分析法,假定1
A.
X=1,X=2,X=9,X=10
B.
X=2,X=9
C.
X=1,X=10
D.
X=1,X=5,X=6,X=10
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【单选题】用边界值分析法,假定 1
A.
X=1, X=100
B.
X=1, X=2, X=99, X=100
C.
X=2, X=99
D.
X=0, X=1, X=99, X=101
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【判断题】People can be contacted at all times.
A.
正确
B.
错误
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【单选题】It is the level for which minimum appropriate protective security measures shall be maintained at all times
A.
At this level, minimum protective security measures shall be kept for a period of time
B.
At this level, maximum protective security measures shall be kept for a period of time
C.
At this level, minimum protective security measures shall be kept all the times
D.
At this level, maximum protective security measures shall be kept all the times
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【单选题】用边界值分析法,假定1
A.
X=1,X=100
B.
X=0,X=1,X=100,X=101
C.
X=2,X=99
D.
X=0,X=101
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【简答题】We should be ready at all times to truth.
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【单选题】The Navigation Rules state that a vessel shall be operated at a safe speed at all times so that she can be stopped within ().
A.
The distance of visibility
B.
1/2 the distance of visibility
C.
A distance appropriate to the existing circumstances and conditions
D.
The distance that it would require for the propeller to go from full ahead to full astern
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【单选题】有关论文投稿准备应注意的事项不包括:
A.
题目有创意
B.
主题要鲜明
C.
论文无定位
D.
论据应核实
查看完整题目与答案
相关题目:
【单选题】Be at all times。
A.
neat
B.
near
C.
never
D.
new
查看完整题目与答案
【判断题】In all construction areas, hard hat must be worn at all times.
A.
正确
B.
错误
查看完整题目与答案
【单选题】用边界值分析法,假定1
A.
X=1,X=2,X=9,X=10
B.
X=2,X=9
C.
X=1,X=10
D.
X=1,X=5,X=6,X=10
查看完整题目与答案
【单选题】用边界值分析法,假定 1
A.
X=1, X=100
B.
X=1, X=2, X=99, X=100
C.
X=2, X=99
D.
X=0, X=1, X=99, X=101
查看完整题目与答案
【判断题】People can be contacted at all times.
A.
正确
B.
错误
查看完整题目与答案
【单选题】It is the level for which minimum appropriate protective security measures shall be maintained at all times
A.
At this level, minimum protective security measures shall be kept for a period of time
B.
At this level, maximum protective security measures shall be kept for a period of time
C.
At this level, minimum protective security measures shall be kept all the times
D.
At this level, maximum protective security measures shall be kept all the times
查看完整题目与答案
【单选题】用边界值分析法,假定1
A.
X=1,X=100
B.
X=0,X=1,X=100,X=101
C.
X=2,X=99
D.
X=0,X=101
查看完整题目与答案
【简答题】We should be ready at all times to truth.
查看完整题目与答案
【单选题】The Navigation Rules state that a vessel shall be operated at a safe speed at all times so that she can be stopped within ().
A.
The distance of visibility
B.
1/2 the distance of visibility
C.
A distance appropriate to the existing circumstances and conditions
D.
The distance that it would require for the propeller to go from full ahead to full astern
查看完整题目与答案
【单选题】有关论文投稿准备应注意的事项不包括:
A.
题目有创意
B.
主题要鲜明
C.
论文无定位
D.
论据应核实
查看完整题目与答案
参考解析:
知识点:
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