问题 单项选择题 A1/A2型题

有关米力农的叙述正确的是()。

A.属强心苷类药

B.属磷酸二酯酶Ⅲ抑制药

C.有正性肌力作用和血管收缩作用

D.合用会增加强心苷毒性

E.可引起血小板减少

答案

参考答案:B

解析:米力农属磷酸二酯酶Ⅲ抑制药,为非儿茶酚胺、非强心苷类正性肌力药。可扩张血管,降低外周阻力,改善微循环,与强心苷合用有协同作用,不会增加强心苷毒性;与氨力农相比副作用较少,不引起血小板减少。

阅读理解

阅读理解。

     Car sharing is another way to drive green which is gaining in popularity, especially in urban areas. People

who may not drive every day but still want a car to run errands (差事) or drive on weekends benefit most

from car sharing. Car sharing is usually run by a service like Zipcar, though there are non-profit (非营利的)

and informal car sharing services. Members pay a monthly fee and have access to an entire fleet of cars when

they need one. The cars are parked in fixed spots around the city, so members only need to make a reservation,

and then go to the pickup spot.

     Car sharing has major environmental benefits because it reduces the number of cars on the road. Members

don't drive just because they are in a car. They plan trips, and if they don't need a car, they don't use one. Still,

a car is available to them if they need to make a big trip to the grocery store, pick someone up at the airport or

if they want to go to the beach for the day. Members also benefit by having access to a car without any of the

headaches of ownership. They usually don't have to pay for the gas, insurance or maintenance (保养), and the

monthly membership fee is less than a typical car payment. So if you really want to go green but aren't ready to

totally give up a car yet, car sharing may be the way to go.

     If you still need to get around, but want to go even greener than sharing a car, share a bus!

1. The author intends to tell us that car sharing _____.

A. has become the most popular way to go to work

B. has become the best way to cut living costs

C. is becoming more and more popular in cities

D. is becoming popular both in urban and rural (乡村的) areas

2. We can learn from the passage that _____.

A. Zipcar can't help you if you are running urgent errands

B. Zipcar, different from other services, is aimed at green driving with no profit

C. Zipcar is a company supplying car sharing services for a monthly payment

D. Zipcar is a company providing formal car sharing free

3. The second paragraph mainly tells us _____.

A. why people will share a car

B. why car sharing benefits the environment

C. why car sharing is cheaper than owning a car

D. why a car is available to members

4. Which of the following is NOT mentioned in the passage?

A. Car sharing has become a new trend (趋势).

B. Car sharing can save you the headaches of ownership.

C. Bus sharing is even greener than car sharing.

D. Zipcar is the largest company offering car sharing services.

问答题 简答题