题目内容

一个圆锥的高不变，底面半径比原来减少25%，则原来的体积比现在多（）/（）

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已知集合A={1，m}，B={2，3}，A ∩B={2}，则A∪B=_____。

秋冬之际，由于天气逐渐变冷，牧场上的草以固定的速度在减少。已知一个牧场上的草可供45头牛吃4天或可供25头牛吃6天。照此计算，这个牧场可供几头牛吃10天？

I’ve already told you that I′ m going to buy it, ____________

A. however much it costs
B. how much does it cost
C. however does it cost much
D. no matter how it costs

'May I speak to your manager Mr. Williams at five o′clock tonight？' 'I′m sorry. Mr. Williams ___________ to a conference long before then.'

A. have gone
B. would have gone
C. had gone
D. will have gone