皮皮学，免费搜题
登录
搜题
【简答题】
改错题。 1. The man came yesterday is our English teacher. 2. The students are playing football on the playground are of Class Two. 3. This is all which I can do for you. 4. Can you think of anyone who's house was here? 5. The watch that Mother bought it for me works very well. 6. This is the only book that were borrowed from the library. 7. The day which she had to leave arrived at last. 8. The doctor whom they want to see have come. 9. Do you know the young man whom has been chosen chairman? 10. The park stands at the place that the two rivers meet. _________ _________ _________ _________ _________ _________ _________ _________ _________ _________
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】电梯内的人手持一挂有重物的弹簧秤,现弹簧秤的读数突然变大(人始终未动),请问此时电梯是在做何运动?()
A.
电梯此时加速下降
B.
电梯此时匀速上升
C.
电梯此时加速上升
D.
电梯此时减速上升
【简答题】表观密度是指材料在绝对密实状态下，单位体积的质量。
【简答题】材料在自然状态下单位体积的重量叫()，在绝对密实状态下单位体积的重量叫()。