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一批货物总重量为1.2×107kg,下列运输工具可将其一次运走的是( ) A.一...
一批货物总重量为1.2×107kg,下列运输工具可将其一次运走的是( )
A.一艘万吨级巨轮
B.一辆汽车
C.一辆拖拉机
D.一辆马车
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某快餐店用米饭加不同炒菜配制了一批盒饭,配土豆丝炒肉的有25盒,配芹菜炒肉丝的有30盒,配辣椒炒鸡蛋的有10盒,配芸豆炒肉片的有15盒.每盒盒饭的大小、外形都相同,从中任选一盒,不含辣椒的概率是( )
A.
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B.
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C.
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D.
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不等式组:
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的解集是( )
A.x≤3
B.1<x≤3
C.x≥3
D.x>1
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如图,由五个完全相同的小正方体组合成一个立体图形,它的俯视图是( )
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C.
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D.
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下列运算中正确的是( )
A.(a
2)
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4
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|
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|的倒数的相反数是( )
A.-2
B.2
C.
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D.
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