混凝土养护龄期为14天。

阅读理解。

     The undersea world is very beautiful. Now more and more people want to dive in the water to find the

secrets there. Scuba diving is a new sport today. It can take you into a wonderful undersea world.

     You will find many strange animals in the sea. Some are as large as a school bus. Many sea animals give

out light in the dark and some have sharp teeth.

     During the day, there is enough light. Here, under the sea, everything is blue and green. When fish swim

nearby, you can catch them with your hands. When you have bottles of air on your back, you can stay in

deep water for a long time. However, you can't dive too deep. And you must be very careful when you dive

in deep water.   

     The deep sea is not an easy place to live in. It's cold, and it's dark, too. The deeper it is, the less sunlight

there is. At about 3,000 feet, there is no light at all. It is dark in the sea. Many fishes have no eyes. Some have

big eyes. A few have eyes on one side.

     Besides (除了) the cold and darkness, deep-sea animals face a third danger---other animals. Animals eat!

They must find food to eat. Many animals eat plants. However, some animals eat meat. This means these sea

animals have two big jobs. They need to find animals as food, and they have to try not to become other animals' meal.

1. Why do people want to dive in the sea? Because ________.

A. they want to catch fish

B. they want to find the secrets of the undersea world

C. the sea is deep

D. there are all kinds of plants in the sea

2. In the daytime, when you dive in the sea, you _________.

A. can see everything green and blue

B. can't be in danger

C. can catch nothing

D. can't see anything clearly

3. How many dangers will animals meet in the deep sea?

A. One.

B. Two.

C. Three.

D. Four.

3. How many dangers will animals meet in the deep sea?

A. One.

B. Two.

C. Three.

D. Four.

4. When you do scuba diving, you can __________.

A. stay in deep water for a long time

B. dive very, very deep

C. live in deep water easily

D. dive freely without any dangers

5. Which of the following is WRONG?

A. One animal finds something to eat, and it may be eaten by others.

B. At the depth of 3,000 feet under the sea, many animals can find their way by hearing and feeling.

C. The deeper the sea is, the darker and colder it is.

D. At the depth of 3,000 feet under the sea, all animals can find their way by seeing.

女性病人，62岁，出现室性心动过速。

上述给药效果如不明显，可间隔多长时间重复()

A．5分钟

B．3分钟

C．10分钟

D．15分钟

E．18分钟

患者女，60岁。有心悸病史8年余，平素心悸气短，面色无华，倦怠乏力，纳呆食少，舌淡红，脉细弱。治疗应选用的方剂为（）

A.炙甘草汤

B.参苓白术散

C.当归补血汤

D.六味地黄丸

E.归脾汤

领导作为一种趋向未来的活动，要求领导者高瞻远瞩、高屋建瓴地进行科学预测。这所体现的领导活动的认识特征是

A．原则性

B．超前性

C．综合性

D．创造性

各省市公司购油量前（）名的客户由分管副经理负责维护，购油量前（）名的客户由省商业客户中心经理负责维护。

A.10；30

B.5；30

C.5；50

D.10；50