强酸烧伤的特点（） A.创面进行性加深 B.大蒜气味，主要引起肝肾功能损害 C.迟发

单词拼写。

1. You can get a lot of useful________(信息) from the Internet.

2. The teacher begins his lesson with a________(描绘) of our school.

3. By the time the police arrived, the thief had________(消失).

4. The old farmer is always________(精力充沛的) as if he never knew tiredness.

5. When we turn on the TV, we can hardly________(避免) watching advertisements, which sometimes trouble us.6. We________(感激) your efforts for the development of the company.

7. Some________(专家) think that language learning is much easier for children as their tongues are more flexible.

8. ________(骆驼) are much better than horses for travelling in the desert area.

9. The________(被遗弃的) disabled children should be taken good care of by the whole society.

10. Seventy percent of the people who were________(调查) suffered from this disease.

正常人血清中可有一定量的伤寒杆菌抗体，但一般范围在（）

A."0"抗体<1：40，"H"抗体<1：80

B."O"抗体<1：80，"H"抗体<1：80

C."O"抗体<1：80，"H"抗体<1：40

D."O"抗体<1：80，"H"抗体<1：160

E."O"抗体<1：40，"H"抗体<1：40

方程|3x|+|x-2|=4的解的个数是（　　）

A．0

B．1

C．2

D．3

PDD是（）

A、百分深度剂量

B、组织空气比

C、散射空气比

D、组织体模比

E、组织最大比

能准确地拼读（），正确书写（）、（）和（）。认识（），熟记《汉语拼音字母表》