河流在弯曲处的流水作用是（） A．凹岸、凸岸均为侵蚀 B．凸岸侵蚀、凹岸堆积 C

已知下图是人体血糖的调节示意图，请据图回答：

(1)正常情况下，发生①变化的主要途径是_________，发生④变化的主要途径是____________。

(2)A激素和B激素在生理效应上呈__________关系，A激素的靶细胞为___________。

(3)从图可以看出对A激素的分泌有影响的因素有：___________(填编号)。

(4)从图可以看出，血糖的调节途径或方法包括_____________。

属于原发性皮肤损害的是（）

A.痂

B.丘疹

C.鳞屑

D.糜烂

E.色素沉着

阅读理解。

     Food sometimes gets poisoned with harmful things. A person who eats such food can get an illness called

food poisoning. Food poisoning is usually not serious, but some types are deadly, The symptoms of food

poisoning usually begin within hours of eating the poisoned food. Fever is one of the most common symptoms.

     Certain microorganisms (微生物) cause most types of food poisoning. Bacteria and other microorganisms

can poison eggs, meat, vegetables, and many other foods. After entering the body, these tiny living things

release (释放) poisons that make people sick.

     Some chemicals can also cause food poisoning. They are often added to food while it is being grown,

processed, or prepaid. For example, many farmers spray chemicals on crops to kill weeds and insects. Some

people may have a bad reaction to those chemicals when they eat the crops.

     Some plants and animals contain natural poisons that are harmful to people. These include certain kinds of

seafood, grains, nuts, seeds, beans, and mushrooms.

     When people handle food properly, the risk of food poisoning is very small Microorganisms multiply rapidly

in dirty places and in warm temperatures. This means that people should never touch food with ditty hands or

put food on unwashed surfaces. Food should be kept in a refrigerator to stop microorganisms from gnawing.

Meat needs to be cooked thoroughly to kill any dangerous microorganisms. People should also wash food

covered with chemicals before eating it. Finally, people should not eat raid mushrooms or other foods that grow

in the wild. Some of these foods may contain natural materials that are poisonous to humans. In addition, some

types of fish can be poisonous.

     Most people recover from food poisoning after a few days of resting and drinking extra water. If people eat

natural poisons, they must go to the hospital right away to have their stomachs emptied.

1. Which of the following statements is NOT true?

A. Food when poisoned can make people sick.

B. Food poisoning means death.

C. Food poisoning comes in varieties.

D. Food poisoning can be serious.

2. We know from the passage that the symptoms of food poisoning _____.

A. are always accompanied by a fever

B. are too common to be noted

C. can be noticed within hours

D. can be ignored

3. Food poisoning can be caused by all the following EXCEPT _____.

A. some chemicals

B. low temperatures

C. some tiny living things

D. certain natural materials

4. From Paragraph 5, we can learn that _____.

A. mushrooms should not be eaten

B. vegetables are safer than meat and seafood

C. natural poisons are more dangerous than chemicals

D. different types of food should be handled differently

5. It can be inferred from the passage that _____.

A. natural materials are safe in food processing

B. chemicals are needed in food processing

C. food poisoning can be kept under control

D. food poisoning is out of control

自然人生前通过购买人寿保险单，指定保险受益人，同样可以实现遗产转移的目的。（）

下列各项，可促进铁吸收的是（）

A.维生素A

B.维生素B

C.维生素C

D.维生素D

E.维生素E