A:a tall man in his thirties stepped
B:stepped a tall man in his thirtie
C:did a tall man is his thirties ste
D:did a tall man step in his thirtie
根据汉语或首字母提示写单词,补全句子
果实由果皮和种子组成,种子是由____发育来的,种子是由____和胚组成.
用24时计时法表示中央电视台晚上《新闻联播》播出的时间,以下表示方法哪一个是正确的( )
A: How old are you?()
B: ___________________.
下列有关遗传的各项叙述中,正确的是