产科范围内的弥散性血管内凝血，在哪些合并症中常发生（）。 A.羊水栓塞 B.胎盘早期

阅读理解。

     There are many wetlands in China and some of them have become internationally important wetlands.

The Chinese Yellow Sea Wetlands are one example. They are in Yancheng, Jiangsu Province. They are

the ideal home for many different kinds of birds and animals. The world's largest Milu Deer Nature

Reserve is there. More than 700 milu deer live freely there. There are not many red-crowned cranes in

the world, but every winter you can see some in the Red-Crowned Cranes Nature Reserve in the

Yellow Sea Wetlands.

     The temperature in the wetlands is usually not too high or too low. There is a lot of rain and sunshine,

too. They are really good places for wildlife. They offer food and home for some special kinds of animals

and birds. It is not the only reason why we need to protect wetlands. Wetlands are important because

they also prevent floods. But some people want to change the wetlands to make space for farms and

buildings. This means there will be less and less space for wildlife.

     Luckily, more and more people are beginning to realize the importance of wetlands and wildlife.

Every year on February 2nd, the World Wetlands Day, many activities are held to tell people more

about wetlands.

1. Which of the following is the ideal home for birds and animals?

A. The Yellow River.              

B. The wetlands.

C. North China.                  

D. Cities in China.

2. What's the weather like in the wetlands?

A. It's very hot.                  

B. It's too cold.

C. There's a lot of snow.            

D. It rains a lot there.

3. Why are the wetlands good places for wildlife?

A. Wildlife can find food and home there.

B. All wildlife can live freely there.

C. There' re enough friends for them.

D. There is enough room for them.

4. What's the use of the wetlands?

A. To raise (饲养) more wildlife.                  

B. To prevent floods.

C. To offer lots of food for human beings.    

D. A and B.

5. Which of the following is Not true?

A. More than 700 milu deer live freely because of the wetlands.

B. We can't see red-crowned cranes in the Yellow Sea Wetlands.

C. February 2nd is the World Wetlands Day.

D. People are beginning to realize the importance of wetlands.

宪法的基本原则

请任选一题作文。 

(1) 不管是生活在喧闹的都市，还是生活在宁静的乡村，每个人对大自然都会怀有浓浓的依恋之情。某一次走进自然的行动，会给你留下难忘的记忆：也许是观赏万顷碧波，也许是留意田间小路，也许是仰望当空皓月，也许是谛听枝头蝉鸣……自然的美妙让你流连忘返，心醉神迷。请以“          让我陶醉”为题，写一篇不少于600字的作文。

（2）“责任”的意思之一是“指分内应做的事”。“天小兴亡，匹夫有责。”大至民族兴亡，社会稳定；中至地区发展，学校荣辱；小至家庭和睦，个人前途，无不有我们的责任。遵守法纪，搞好学习，尊敬师长，孝敬父母，善待同学，做好小事，样样都是我们分内应做的事。 

请以“责任”为话题，自定题目，自选文体（诗歌除外），写一篇600字以上的文章（文中不要出现真实学校、人名）。

（3）幸福是什么?幸福有时是一种拥有，有时是一种等待，有时也是一种感动。收获是一种幸福，付出也是一种幸福；功成名就是一种幸福，淡泊宁静也是一种幸福„„其实幸福就在我们身边，在我们点点滴滴的生活中，在我们成长上的每一个脚印里。     

请以“这就是幸福”为题写一篇不少于500字的文章。

定位基准按用途分，有（）基准、（）基准、测量基准。

图示平面机构，杆OO₁长l=4m，以角速度ω₁=1rad/s绕O₁转动，此时有角加速度ε₁=2rad/s²；杆端O以光滑销钉与半径为R=2m圆轮相接，圆轮此瞬时绕O有角速度ω₂=2rad/s和角加速度ε₂=1rad/s²。以M点为动点，动坐标固结在杆OO₁上，静坐标固结在地面。则在O₁O延长线上轮缘M点的科氏加速度的大小为（）。

A.16m/s²

B.12m/s²

C.8m/s²

D.6m/s²