问题 单项选择题

唾液通过以下途径发挥杀菌和抗菌作用,其中不包括()

A.溶菌酶破坏细菌细胞壁

B.乳铁蛋白抑制细菌生长

C.免疫球蛋白干预微生物对口腔表面的附着

D.过氧化物酶-硫氰酸盐抑制某些厌氧菌生长

E.碳酸氢盐

答案

参考答案:E

阅读理解

阅读短文,按要求做下列题。

Dear Tommy,

     Can you take some things to Helen? These things are: her alarm clock, math book, bag, ID card, notebook

and hat. The alarm clock is on the desk. The math book is on the desk, too. The bag is in the drawer. The

notebook is in the bookcase. The ID card is in the notebook. And the hat is on the chair.

                                                                                                                                            Thanks,

                                                                                                                                                Sally

1. 上面哪些物品文中提到过?请选出,并将其变为复数形式。

    __________________________________________________

2. 请将画线的两个句子合并为一个句子。

    __________________________________________________ 

3. 判断下面句子的正(T) 误 (F)。

( ) (1) Helen's bag is on the dresser.

(     ) (2) Her ID card is in the notebook.

(     ) (3) Her notebook is on the chair.

4. 为下面的两题选择正确的答案。

(1)  _____ writes (写) the note.

A. Helen

B. Sally

C. Tommy

(2) Where's her hat?

A. It's under the bed.

B. It's on the chair.

C. It's in the drawer.

5. 翻译文章中斜体字部分。

    _________________________________________

多项选择题