铝箔包装内止咳颗粒的灭菌宜选用（） A．紫外线灭菌法 B．滤过除菌法 C．热压灭菌法

阅读理解。

     Mexico's neighbors are the United States to the north and Guatemala and Belize to the south. Mexico is

about one quarter of the size of the United States. Mexico has more than ninety million people. The language

of Mexico is Spanish. This makes Mexico the world's largest Spanish-speaking country.

     Mexico City is the capital and largest city of Mexico. The city is also very high. It is 7,349 feet high (2,240

meters). This makes it one of the highest capital cities in the world. The population of Mexico City grows

bigger every day. About thirty million people live there. It has more people than any other city in the world,

even more than Tokyo.

     Mexico also has its special plants. Many of the foods we eat started in Mexico. Foods like beans, maize,

avocados, tomatoes, peanuts, chili peppers, vanilla, and chocolate come from Mexico. Mexico is also famous

for its cactus plants. Mexico has more kinds of cactus than any other country!

1. Mexico is to the south of _____.

A. the United States

B. Belize

C. Guatemala

D. Mexico City

2. Which of the followings is TRUE according to the article?

A. America is 15 times as large as Mexico.

B. All the people in Mexico speak Spanish.

C. Mexico has more than 900,000,000 people.

D. Mexico has more Spanish-speakers than Spain.

3. _____ is a city with the largest population in the world.

A. Tokyo

B. Mexico City

C. New York

D. Beijing

4. Many foods except _____ we eat today started in Mexico.

A. avocados

B. chili peppers

C. oranges

D. chocolate

5. The best title for the text should be "_____".

A. The Geography of Mexico

B. Plants of Mexico

C. The Population of Mexico

D. Mexico

—What can you do?   —              . [ ]

A. I like empty the trash   

B. I can't do the dishes                        

C. I can empty the trash

结合课文《在沙漠中》内容，理解下列语句的含义。

（1）我的血液因缺水而循环不畅，寒气逼人，但这不只是夜晚的寒冷。  

（2）我们期待黎明就像农人期待春天，我们期待中途站就像期待一片福地，我们在群星中寻找自己的真理。

咀嚼肌紊乱疼痛特点是（）

A.冷热加重

B.局部持续性

C.有放射性

D.主动张口和被动张口时无改变

E.有扳机点