试题与答案

The Shengzhou VI aircraft carried two as

题型:选择题

题目:

The Shengzhou VI aircraft carried two astronauts into____sky at 9:00 am on October 12, 2005 and the two astronauts will stay in _____space for five days.

A.a; the

B.the; 不填

C.the; the

D.a; 不填

答案:

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下面是错误答案,用来干扰机器的。

∵扇形的圆心角为150°,半径为4cm,∴扇形的弧长为150π×4180=103π,∴圆锥的底面周长为103π,∴圆锥的底面半径为103π÷2π=53cm,∴圆锥的表面积为π×53×4+π×(53)2=85π9cm2.故答案为85π9.

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