硝苯地平的适应证不包括A．高血压 B．心绞痛 C．阵发性室上性心动过速 D．肺动脉高

以下关于非0的MST Instance的生成树计算过程的描述正确的是？（）

A.一个区域中不同的MST Instance可以使用不同的交换机做为根交换机。

B.一个非根交换机可以有多个根端口，用于连接不同的MST Instance的根交换机。

C.不同区域的非0的MST Instance的计算过程互相独立。

D.一个非根交换机的端口在不同的MST Instance中可以有不同的状态。

工业以轻工业为先导逐渐转向以重工业、化学工业为中心的发展过程，即所谓重、化学工业化过程。目前在发达国家中，重工业、化学工业在整个工业中的比率，一般均在60%～65%之间。尽管各国人均国民收入差别较大，但重工业、化学工业比率一般相差不大。 最能准确复述这段话主要意思的是( )。

A．工业发展过程目前呈现由轻工业向重工业、化学工业转化的趋势

B．在发达国家，重工业和化学工业是基础工业，因而所占比例很大

C．发达国家重工业和化学工业所占比例之大说明其受重视的程度

D．工业重心的转移将影响人均国民收入

下列关于肾癌有叙述，错误的是（）

A．肾细胞癌是最常见的肾脏恶性肿瘤 

B．动核灌注扫描早期常明显强化 

C．延迟期肿瘤一般仍强化明显，且高于实质期 

D．20%有肾癌为低血供肿瘤，在毛细血管期强化不明显 

E．肿瘤的包膜在MRI上常可观察到 

阅读理解

     Why did the chicken cross the road? To get to the other side.

     Most people know this joke. But recently, some people have been much more worried about how the grizzly bear and mountain lion can cross the road.

     "Millions of animals die each year on U.S. roads," the Federal Highway Administration reports. In fact, only about 80 ocelots, an endangered wild cat, exist in the U. S. today. The main reason? Road kill.

     "Eco-passages" may help animals cross the road without being hit by cars. They are paths both over

and under roads. "These eco-passages can be extremely useful, so that wildlife can avoid road accidents," said Jodi Hilty of the Wildlife Protection Society.

      But do animals actually use the eco-passages? The answer is yes. Paul Beier of Northern Arizona

University found foot marks left by mountain lions on an eco-passage that went under a highway. This

showed that the lions used the passage.

     Builders of eco-passages try to make them look like a natural part of an area by planting trees on and

around them. Animals seem to be catching on. Animals as different as salamanders(火蜥蜴)and grizzly

bears are using the bridges and underpasses.

     The next time you visit a park or drive through an area with a lot of wildlife, look around. You might see an animals overpass!

1. The writer uses the example of "ocelots" to show that __________.

A. an increasing number of animals are killed in road accidents

B. the driving conditions have improved greatly

C. the measure for protecting wildlife fails to work

D. wild animals have become more dangerous

2. From the news story, we know an eco-passage is __________.

A. an underground path for cars

B. a fence built for the safety of the area

C. a pass for animals to cross the road

D. a bridge for animals to get over a river

3. When the writer says that animals seem "to be catching on", he means __________.

A. animals begin to realize the dangers on the road

B. animals begin to learn to use eco-passages

C. animals are crossing the road in groups

D. animals are becoming safer

4. The writer asks visitors and drivers to look around when traveling because __________.

A. wild animals may cause danger

B. wild animals may jam the road

C. they may kill the animals

D. they may see wild animals on eco-passages

5. This passage is written to __________.

A. protect the endangered animals

B. call on drivers to be careful when seeing animals on roads

C. introduce a new way to help protect animals

D. tell us the main reason for the killing of animals in the US

下列有关DNA分子结构的叙述错误的是（）

A.双链DNA分子中含有两个游离的磷酸基团

B.DNA的一条单链上相邻的碱基A与T之间通过氢键连接

C.嘌呤碱基与嘧啶碱基的结合保证了DNA分子空间结构的相对稳定

D.DNA分子两条链反向平行