下列生物属于爬行类的是[ ] A．家鸽 B．蟾蜍 C．蜥蜴 D．蚯蚓

阅读短文，并按要求完成下列句子。

     We know that many animals do not stay in one place. Birds, fish and other animals move from one

place to another place at a certain time. They move for different reasons: most of them move to find food

more easily, but others move to get away from places that are too crowded.

     When cold weather comes, many birds move to warmer places to find food. Some fishes give birth in

warm water and move to cold water to feed. The most famous migration is probably the migration of fish,

which is called "salmon"(鲑鱼).This fish is born in fresh water but it travels many miles to salt water. There

it spends its life. When it is old, it returns to its birthplace in fresh water. Then it gives birth and dies. In

northern Europe, there is a kind of mouse. They leave their mountain homes when they become too crowded.

They move down to the low land. Sometimes they move all the way to the seaside, and many of them are

killed when they fall into the sea.   

     Recently, scientists have studied the migration of a kind of lobster (龙虾). Every year,when the season

of the bad weather arrives, the lobsters get into a long line and start to walk across the floor of the ocean.

Nobody knows why they do this, and nobody knows where they go. So, sometimes we know why humans

and animals move from one place to another place,but at other times we don't. Maybe living things just like

to travel.

1. Most animals move from one place to another at a certain time to _______.

A. give birth

B. enjoy warmer weather

C. find food more easily

2. The fish called "salmon" spends a long time in _______.

A. salt water

B. rivers

C. fresh water

3. The mice in northern Europe move when _______.

A. they give birth

B. the place gets too crowded

C. they haven't enough food

4. The lobsters move _______.

A. to the fresh water

B. at a certain time

C. to find more food

5. What is the main idea of the passage?

A. Animals move to find food more easily.

B. The migration of the fish called "salmon" is the most famous migration.

C. Sometimes we know why and how living things move from one place to another,but sometimes we don't.

患者男性，78岁。因活动后心悸，气短，头晕1年来诊。既往高血压病史10年，长期口服美托洛尔。查体：BP180/80mmHg，双肺呼吸音清，心界不大，心率37次/分，律不齐，无杂音。心电图提示（Ⅱ导联）如图所示。

根据患者的病情，可以选用的药物治疗有 （）

A.异丙肾上腺素

B.心律平

C.阿托品

D.异搏定

E.胺碘酮

F.利多卡因

某企业为增值税一般纳税人，2014年5月份发生下列经济业务：

5月31日，在财产清查中，查明库存现金短缺1000元，其原因无法查明。

皮肤黏膜出现淡红色斑点，隐隐稀少，压之不退，伴诸虚症状，此为

A．阴斑
B．阳斑
C．风疹
D．隐疹
E．麻疹

下列化合物具有旋光活性的是（）

A.黄酮醇

B.黄酮苷

C.查耳酮

D.二氢黄酮

E.异黄酮