A组β溶血性链球菌感染人体后,可因机体免疫水平的差异而导致()
A.猩红热
B.咽喉炎
C.丹毒
D.新生儿败血症
E.感染性心内膜炎
参考答案:A, B, C
连词成句。
1. sleep, I, the, bedroom, in
___________________________________________
2. together, book, read, a
3. home, family, help, I, at, my
4. on, I, computer, play, the
下列哪个选项是合法的标识符
A.123
B._name
C.class
D.1first