A:32He核聚变是化学变化
B:32He和42He互为同位素
C:32He原子核内含有3个中子
D:32He原子核内含有3个质子
目前,导致莫高窟洞内壁画破坏的主要原因是( )
给下列问答句配对
① What do you need?____ a. I like the red dress.
② Drink some water, Mum. ____ b. Thank you.
③ What do you like? ____ c. I need a red dress.
④ Smell the orange. ____ d. It's windy.
⑤ How is the weather? ____ e. It's nice.
我国历史上一次空前的大思想解放运动是( )