(A) 条件(1)充分，但条件(2)不充分．
(B) 条件(2)充分，但条件(1)不充分．
(C) 条件(1)和条件(2)单独都不充分，但条件(1)和条件(2)联合起来充分．
(D) 条件(1)充分，条件(2)也充分．
(E) 条件(1)和条件(2)单独都不充分，条件(1)和条件(2)联合起来也不充分．
已知圆柱底面半径为rcm，高为hcm，则圆柱的侧面积是10πcm2.
(1)r=5，h=2．
(2)
参考答案：B
解析：
圆柱体侧面积．
条件(1)，
S=2πrh=10π×2=20π，
不充分；
条件(2)，
充分，
[评注] 本题主要考查圆柱的侧面积求解公式．
The Malaysian government announced that Malaysian flight MH370 lost the contact with the Air Traffic Control the morning of March 8th. The flight at 00:41 a.m. that morning and planned to arrive in Beijing at 6:30 a.m. It carried 239 passengers, 154 Chinese. The passengers come from 14 countries and areas. Nobody knows what happened to the plane. Over twenty countries took part in it. On March 24, Prime Minister of Malaysia said that MH370 crashed in southern Indian Ocean and none of the passengers survived. When we heard the bad news, we were very sad. So far the plane wreckage(飞机残骸) yet. We hope they will find it soon.
| 小题1: | A．in B．at C．on D．for |
| 小题2: | A．takes off B．landed C．was taken off D．took off |
| 小题3: | A．including B．except C．besides D．inclusion |
| 小题4: | A．searching out B．searching for C．looking for D．looking out |
| 小题5: | A．hasn’t been founded B．wasn’t found C．hasn’t been found D．has been found |