A:①②③
B:①②④
C:①③④
D:②③④
The husband appreciates that his wife always avoids________him in front of his friends.
构成染色体的物质主要是( )
给下列句子换一种说法。
只听一声巨响,“诺曼底”号的船身一下被“玛丽”号剖开了一个大口子。
由上述实验数据和现象可得出结论:____.