A:网球与球拍撞击时,球拍发生形变是因为力改变了物体的形状
B:网球撞击球拍的力和球拍对网球的弹力是一对平衡力
C:网球离开球拍后能继续飞行是由于网球具有惯性
D:飞行的网球最终落向地面是因为受到重力的作用
下列高中生物的实验中必须使用无菌水的是
(report报告;umbrella雨伞)
Cities
Weather
Beijing
It's sunny, but it will be ____ in the afternoon.
Qingdao
The weather is fine and ____.
Harbin
It's snowy and ____.
Xi'an
It's sunny and warm.
Guangzhou
It's ____ and ____
用所给单词的适当形式填空。
Kill ____ (he).
Please e-mail me _______ girljane@163.com.