根据细菌胞壁糖类抗原将变形链球菌分为a~h共8个血清型,其中在人类检出率最高的血清型为()
A.acf
B.def
C.cef
D.dee
E.都不正确
参考答案:D
单词拼写。
1. I invited him to dinner but he didn't ______ (回复) yesterday.
2. Have you heard from your brother ______ (近来)?
3. A few ______ (过路人) saw the accident.
4. You want me to buy you a car. Do you think I'm a ______ (百万富翁)?
5. I found your menu so ______ (有限) that I stopped worrying.
6. You can't go out alone without your parents' ______. (允许)
7. Children are ______ (好奇) about anything, so teachers and parents should satisfy them.
8. After 3 years' hard work, he was out of ______ (债务).
9. Never judge someone by his ______ (外貌). The quality is more important.
10. The last ______ (戏剧一场) of the play was very moving.
英国开辟北美殖民地的主要目的是 [ ]
A.转移本国人口
B.把它作为原料产地与商品市场
C.帮助北美发展经济
D.为了证明地球是圆的