A:当剪断细线的瞬间,物体的加速度为7.5m/s2
B:当剪断弹簧的瞬间,物体所受合外力为15N
C:当剪断细线的瞬间,物体所受合外力为零
D:当剪断弹簧的瞬间,物体的加速度为7.5m/s2
考场上的你,信心满满,大脑如陀螺般飞速运转,笔尖轻快地写下答案.这些生命活动需要消耗能量.能量来自于细胞内有机物的氧化分解.这个过程是怎样的呢?
根据短文填表。
Mrs. Wilson is not tall with curly hair. She comes from Australia. She is our math teacher. But I don't like maths. It's too difficult and boring. Mrs. Wilson is 25 years old. She is very shy and kind of serious. She never plays games with us. She often sees the films on weekends. And she enjoy reading very much. She has lots of books in her bedroom.
Name: Mrs. Wilson
Age:____
Nationality(国籍): ____
Likes:____
Job:____
Appearance(外貌):____
以下是加热盛固体药品的试管制气体时,检查装置气密性的主要环节,其顺序正确的是( )①将手紧贴试管外壁,观察导管口现象②将导管的另一端浸入水中③移开手,观察导管内现象
读《贾芸谋差》,“贾芸出了荣国府回家,一路思量,想出一个主意来”,联系全文分析,贾芸想出的主意是什么?
选词填空。
believe,lively,rock,exercise,piece
Deng Feng is my friend.He is____and interested in music.He usually gets up at 6:00 in the morning and then he does some____in the park.He likes to listen to____music When exercising.Before going to bed,he listens to some____of light music.Sometimes he'd like to enjoy traditional Chinese music.He____it's a good way to relax.Some day,he will study music and be a musician.