1.选择题- (共6题)
质量2.5kg的物体被200N的水平压力压在竖直墙上静止,如右图所示.此时物体对墙的压力是{#blank#}1{#/blank#}N,此物体受到的摩擦力是{#blank#}2{#/blank#}N.(g取10N/kg).
冰壶运动是冬奥会的比赛项目,如图甲所示.冰道的左端有一个发球区,运动员在发球区边沿的投掷线MN将冰壶以一定的初速度推出,使冰壶沿着冰道的中心线PO滑行,冰道的右边有一个圆形的营垒,如图乙所示,以场地上冰壶最终静止时距离营垒圆心O的远近决定胜负,投掷线MN与营垒圆心O的距离是30m.
起重机吊着49000N的重物,当重物匀速上升时,钢丝绳拉物体的力{#blank#}1{#/blank#}49000N;当重物匀速下降时,钢丝绳拉物体的力{#blank#}2{#/blank#}49000N.(填“大于”、“等于”或“小于”)
起重机吊着49000N的重物,当重物匀速上升时,钢丝绳拉物体的力{#blank#}1{#/blank#}49000N;当重物匀速下降时,钢丝绳拉物体的力{#blank#}2{#/blank#}49000N.(填“大于”、“等于”或“小于”)
起重机吊着49000N的重物,当重物匀速上升时,钢丝绳拉物体的力{#blank#}1{#/blank#}49000N;当重物匀速下降时,钢丝绳拉物体的力{#blank#}2{#/blank#}49000N.(填“大于”、“等于”或“小于”)
2.单项选择- (共8题)
A.mark | B.sign | C.symbol | D.signal |
A.a; / | B.the ; the | C.the; an | D./; an |
A.three times the size as | B.the size three times of |
C.three times as the size of | D.three times the size of |
A.occurred; caused | B.happened; caused |
C.occurred; causing | D.happened; to cause |
A.turning | B.to turn | C.to be turned | D.turned |
A.in; in | B.with; from | C.with; at | D.in; from |
--Very late. Half of it ________ by the time we ________ the cinema.
A.was shown; reached | B.had been shown; reached |
C.was shown; had reached | D.had been shown; had reached |
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【1】题量占比
选择题:(6道)
单项选择:(8道)
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【2】:难度分析
1星难题:0
2星难题:0
3星难题:0
4星难题:0
5星难题:0
6星难题:8
7星难题:0
8星难题:0
9星难题:0