设备维护部门应建立备品备件台帐，做好出库、入库记录。（）
参考答案：对
火箭载着宇宙探测器飞向某行星，火箭内平台上还放有测试仪器，如图所示．火箭从地面起飞时，以加速度g02竖直向上做匀加速直线运动（g0为地面附近的重力加速度），已知地球半径为R，升到某一高度时，测试仪器对平台的压力刚好是起飞时压力的1727，求此时火箭离地面的高度h．
句型转换。
1. I was doing my homework when Li Lei called me. (就画线部分提问)
______ ______ you doing when Li Lei called you?
2. We were watching TV at 9:00 last night. (改为否定句)
We______ ______ watching TV at 9:00 last night.
3. I was talking with my friends when Mr. Wang came in. (用while改为同义句)
Mr. Wang came in______ I was talking with my friends.
4. He gave the police a call just now. (改为同义句)
He ______ the police just now.
5. Do you have supper at 7: 00 every evening? (用last night改写句子)
______ you ______ supper at 7: 00 last night?
