小明以正常速度匀速上二楼,下列估测与实际相符的是( ) A.小明体重约为50N

题型:选择题

问题:

小明以正常速度匀速上二楼,下列估测与实际相符的是(  )

A.小明体重约为50N

B.他上楼大约做了150J的功

C.小明上楼的功率约为200W

D.他在上楼过程中,动能转化为重力势能

考点:功的计算功率的计算动能和势能的应用重力大小的估测
题型:选择题

单词拼写。根据下列各句句意和空白之后的汉语提示词,在横线上写出对应单词的正确、完整形式,

每空只写一词。

1. The smell of _____ (新鲜的)bread and frying eggs filled the kitchen.

2. He has devoted his whole life to world _____ (和平).

3. Alexander Graham Bell became famous overnight by _____ (发明)the telephone.

4. Several companies have announced their intention to _____ (竞争)for the construction project.

5. Both my parents were born in _____ (十月), but five years apart.

6. The symptoms of flu may be unpleasant, but they _____ (消失) within a few days.

7. Christophe Bites was born and brought up in France, but he speaks English _____ (流利地).

8. Among the many _____ (业余爱好) of his are reading, music and tennis.

9. Sue Wood was only nine when her first short story was _____. (出版).

10. I have an _____ (道歉) to make to you-I'm afraid I opened your letter by mistake.

题型:选择题

关于胆囊结石描述,错误的是

A.胆囊结石均有症状

B.进食油腻食物后症状加重

C.大的单发结石不易发生嵌顿

D.结石嵌顿于胆囊壶腹后,导致急性胆囊炎

E.胆绞痛向右肩部放射

题型:选择题

表皮内无以下细胞()。

A、角质形成细胞

B、黑素细胞

C、梅克尔细胞

D、纤维细胞

题型:选择题

后景深()前景深。

题型:选择题

()内存区域用来存储最近执行的语句的解析结果。

A.DATABUFFER CACHE

B.LIBRARY CACHE

C.DICTIONARY CACHE

D.LOGBUFFER CACHE

更多题库