一种按同步方式实现数字信号复用的等级系列，称同步数字系列，英文缩写为（）。A、PDN

A thousand years ago, Hong Kong was covered by a thick forest. As more and more people came to live in Hong Kong, these trees were cut down and burnt.  Now there is no forest left, though there are still some small areas covered with trees. We call these woods.

Elephants, tigers and many other animals were living in the thick forest. When people came to live in Hong Kong, the animals began to die out. Early farmers grew rice and kept pigs and chickens in the valleys. They cut down the trees and burnt them. They needed fire to keep themselves warm in winter, to cook their food and to keep away the dangerous animals. Elephants quickly disappeared because there was not enough food for them. Many other animals soon died in the same way.

You might think that there are no longer any animals in Hong Kong except in 2005. But there are still about 36 different animals living there. One of the most interesting of Hong Kong’s animals is the barking deer. These are beautiful little animals with a rich brown coat and a white patch under the tail. They look like deer but they are much smaller. They are less than two feet high. They make a noise rather like a dog barking. In Hong Kong the barking deer has only a real enemy—— men. People hunt these little animals though it is illegal, There are now not many barking deer left. So it is important for people to protect wild animals.

小题1:There was _____ in Hong Kong a thousand years ago.

A．a mountain

B．the woods

C．a thick forest

D．a hill小题2:The _____ began to die out when people came to live in Hong Kong.

A．animals

B．pigs

C．trees

D．chickens小题3:Elephants quickly disappeared because _____.

A．they didn't want to live there

B．there wasn’t enough food for them to eat

C．they liked living with other people

D．they didn't like Hong Kong at all小题4:From the passage, what do we know about the baking deer in Kong Hong?

A．They are so delicious that people have to eat them.

B．There are not many barking deer now.

C．They look like deer but they are dogs.

D．They have many real enemies including men.小题5:The passage tells us that _____.

A．we can eat wild animal

B．we must kill the barking deer

C．people can hunt little animal

D．it's important for us to protect the wild animal

关于胶体和溶液的叙述中正确的是（　　）

A．胶体的分散质不能通过滤纸空隙，悬浊液的分散质也不能

B．只有胶体才能发生布朗运动

C．分散质粒子在1-100nm间的分散系为胶体

D．区别胶体和悬浊液必须用丁达尔现象E．区别胶体和悬浊液必须用丁达尔现象

患者，男性，31岁。尿频、尿急、尿痛1年余，有时尿浑浊，抗感染治疗后症状无明显改善。尿液检查：脓细胞满视野，蛋白（++）。B超提示右肾积水，输尿管探测不清楚。

术后患者继续抗结核治疗，多次尿结核杆菌检查（-），尿常规：白细胞0～1个/HP，但尿频反较术前明显，最可能的原因是（）

A.膀胱挛缩

B.慢性细菌性膀胱炎

C.尿路结核复发

D.前列腺增生

E.精神性尿频

函数f(x)＝xsin|x|在点x＝0处( )。

A．不连续

B．不可导

C．可导且F'(0)=0

D．可导且f'(0)＝1

EPS钢丝网架板现浇混凝土外墙外保温构造将一种由工厂预制的保温构件放在墙体钢筋（）侧。

A、内

B、外

C、哪侧都可以