[填空题]Efficient air conditioning system will help maximize the distance an electric cur can cover.

[填空题]Efficient air conditioning system will help maximize the distance an electric cur can cover.

[单项选择]The very fresh air will finally help her to resume her health.
A. bring back
B. contribute
C. do harm
D. rebuild

[填空题]I.
A—air traffic control system J—safety precaution measure
B—armed police K—safety control device
C—crime prevention L—security command center
D—entry requirement M—security service
E—international criminal police organization N—security control center
F—level of security O—security personnel
G picket line P—valid documents
H—police station Q—security monitoring and control
I—patrolling vehicle

( ) 空中交通管制系统 ( ) 安全预防措

[填空题]

I.
A—air traffic control system J—safety precaution measure
B—armed police K—safety control device
C—crime prevention L—security command center
D—entry requirement M—security service
E—international criminal police organization N—security control center
F—level of security O—security personnel
G picket line P—valid documents
H—police station Q—security monitoring and control
I—patrolling vehicle

（）空中交通管制系统（）安全预防措

[简答题]air carriers

[单项选择] Air Pollution When people think about air pollution, they usually think about smog, acid rain, CFC’’s, and other forms of outdoor air pollution. But did you know that air pollution also can exist inside homes and other buildings It can, and every year, the health of many people is affected by chemical substances present in the air within buildings. A great deal of research on pollution is being conducted at laboratories and universities. The goals of the research are to find solutions and to educate the public about the problem. Two places where this type of work is being done are LBNL and the University of California, Berkeley. Let’’s take a closer look at the various types of air pollution, the effects that they have on people, and what is being (or not being) done to correct the problem. What Is Air Pollution Air is the ocean we breathe. Air supplies us with oxygen which is essential for our bodies to live. Air supplies us with o
A. Y
B. N
C. NG