问题 单项选择题 A3型题

某医院为了全面预防传染性非典型肺炎(SARS)在冬春季可能出现的流行和传播,特制定一整套消毒防疫措施,进行了消毒剂(器)的采购和专业人员的培训,布置了立体的防疫网络。

在传染性非典型肺炎的防疫网络中可以不考虑()

A.自来水污染

B.空气污染

C.接触传播

D.物表污染

E.器械污染

答案

参考答案:A

阅读理解

Space is where our future is — trips to the Moon, Mars and beyond. Most people would think that aside from comets(彗星) and stars, there is little else out there. But, since our space journey started we have left so much trash(垃圾) there that scientists are now concerned that if we don't clean it up, we may all be in mortal (致命的)danger.

The first piece of space junk was created in 1964, when the American satellite Vanguard I stopped operating and lost its connection with the ground center. However, since it kept orbiting around the Earth without any consequences, scientists became increasingly comfortable abandoning(抛弃) things that no longer served any useful purpose in space.

It is estimated (估计)that there are now over 500,000 pieces of man-made trash orbiting the Earth at speeds of up to 17,500 miles per hour. The junk varies from tiny pieces of paint chipped off rockets to cameras, huge fuel tanks, and even odd items like the million-dollar tool kit that astronaut Heidemarie Stefanyshyn Piper lost during a spacewalk.

The major problem with the space trash is that it may hit working satellites and damage traveling spacecraft(飞船). Moreover, pieces of junk may collide(碰撞) with each other and break into pieces which fall back to the Earth. To avoid this, scientists have invented several ways for clearing the sky. Ground stations have been built to monitor larger pieces of space trash to prevent them from crashing into working satellites or space shuttles. Future plans include a cooperative effort among many nations to stop littering in space and to clean up the trash already there.

小题1:What was the first piece of man-made space trash­?

A.A camera.

B.A tool kit.

C.A fuel tank.

D.A broken satellite.小题2:Why were scientists NOT concerned about space trash in the beginning?

A.It no longer served any useful purpose.

B.It was millions of miles away from the Earth.

C.It did not cause any problems.

D.It was regarded as similar to comets and stars.小题3:Which of the following statements is true about space junk?­

A.It is huge, heavy machines.

B.It never changes position.

C.It floats slowly around the Earth.

D.It may cause problems for space shuttles.小题4:What has been done about the space trash problem­?

A, Scientists have cleaned up most of the trash.

B. Large pieces of space trash are being closely watched.

C. Many nations have worked together to stop polluting space.

D. Ground stations are built to help store the trash properly in space.

填空题