发动机活塞销响的主要原因：一是活塞销与连杆衬套之间的配合间隙过大而致松旷；二是活塞销

虚喘的治疗为

A．补肺

B．温肾

C．健脾

D．培补摄纳

E．固脱

（）行业表现出较强的生产半径和销售区域的特征。

A.水泥

B.软件

C.金融

D.服装

防洪标准等级为工级的通信局站是()。

A.移动基站

B.宽带接入站

C.微波通信站

D.卫星地球站

The destruction of our natural resources and contamination of our food supply continue to occur, largely because of the extreme difficulty in affixing (把……固定) legal responsibility on those who continue to treat our environment with reckless abandon (放任). Attempts to prevent pollution by legislation, economic incentives and friendly persuasion have been met by lawsuits, personal and industrial denial and long delays—not only in accepting responsibility, but more importantly, in doing something about it.

It seems that only when government decides it can afford tax incentives or production sacrifices is there any initiative for change. Where is industry’s and our recognition that protecting mankind’s great treasure is the single most important responsibility If ever there will be time for environmental health professionals to come to the frontlines and provide leadership to solve environmental problems, that time is now.

We are being asked, and, in fact, the public is demanding that we take positive action. It is our responsibility as professionals in environmental health to make the difference. Yes, the ecologists, the environmental activists and the conservationists serve to communicate, stimulate thinking and promote behavioral change. However, it is those of us who are paid to make the decisions to develop, improve and enforce environmental standards, I submit, who must lead the charge.

We must recognize that environmental health issues do not stop at city limits, county lines, state or even federal boundaries. We can no longer afford to be tunnel-visioned in our approach. We must visualize issues from every perspective to make the objective decisions. We must express our views clearly to prevent media distortion and public confusion.

I believe we have a three-part mission for the present. First, we must continue to press for improvements in the quality of life that people can make for themselves. Second, we must investigate and understand the link between environment and health. Third, we must be able to communicate technical information in a form that citizens can understand. If we can accomplish these three goals in this decade, maybe we can finally stop environmental degradation, and not merely hold it back. We will then be able to spend pollution dollars truly on prevention rather than on bandages.

The word "tunnel-visioned" most probably means "（）".

A. narrow-minded

B. blind to the facts

C. short-sighted

D. able to see only one aspect

在给病人鼻饲插管时，如果病人呛咳，呼吸困难，正确处理的方法是

A．嘱病人深呼吸
B．嘱病人做吞咽动作
C．托起病人头部再插
D．拔出管子，休息缓解后重新插管
E．停止操作，取消鼻饲