气体火警探测器安全监控电门断开的原因（）.A、在-65°Ｆ以下温度工作 B、探测器管

我国的政策性银行是具有法人资格的国有银行，其直属领导机构是( )。

A．国务院

B．财政部

C．中国人民银行

D．全国人大

引水枢纽可分为（）。

A.无坝引水

B.有坝引水

C.正面引水

D.侧面引水

Government officials reported three new cases of mad cow, bringing the total so far this year to 99. Last year, France recorded just 31 cases of the mad cow disease. The rising numbers are in part (1) a new testing program that focuses on cows that are most (2) . That program has (3) 39 cases. But still 60 new cases were identified in the usual way, (4) were found in 1999. Many scientists (5) that this year, five years after safety precautions were (6) , the number of cases would be (7) .

The rise in cases has (8) some scientists to question whether the disease can be transmitted in ways not yet understood. Scientists are still (9) the disease, first recognized in cows in 1986.

It appears that it is not caused by a bacteria, virus or fungus, but (10) infectious particles called prion, perhaps (11) a virus or other agent. The disease kills cells in the brain, (12) it spongy and full of holes.

France has taken more steps to (13) safety than most European countries, (14) refusing to take English beef (15) the European Union. But some scientists believe that France has not been (16) in imposing the ban on feed that (17) animal pans.

Some French officials hope that the sudden interest in mad cow disease will mean that French consumers will become educated about it, thereby recognizing that French beef is actually (18) controlled. Every cow is given a passport at birth, and extensive information about its parentage and (19) it was raised must be (20) to any slaughterhouse. When a diseased animal is found, the entire herd is destroyed.

11（）

A. grew with

B. agree with

C. coincide with

D. in concert with

在隧道、沟、浅槽、竖井、夹层等封闭式电缆通道中，不得含有可能影响环境温升持续超过( )的供热管道路。

A．10℃；
B．8℃；
C．6℃；
D．5℃。

过磷酸钙的施用方法正确的有（）。

A．集中施用

B．分层施用

C．制成颗粒

D．与有机肥混合施用