允许掘进距离是指从探水线开始向前方打探钻水一次打透积水的安全距离。

以下哪项不是小儿呼吸道易梗阻的原因

A.鼻腔分泌物多 

B.舌体大 

C.颈短 

D.腺样体小 

E.呼吸道窄 

2011年12月16日，世界贸易组织第八次部长级会议在日内瓦正式批准俄罗斯加入世贸组织。俄罗斯人们需要了解的相关世贸组织的内容不包括(　　)。

A．1995年是其建立的时间

B．成员国市场是开放的

C．贸易壁垒的消除是时间问题

D．规范化、法制化的贸易体系早在20世纪40年代就确立了

In country after country, talk of nonsmoker’s right is in the air. While a majority of countries have taken little (51) no action yet, some 30 nations have introduced legislated steps to control smoking. Many laws have been introduced in other countries to (52) clear the air for nonsmokers, or to cut cigarette consumption.

Smoking is harmful (53) the health of people. World governments should conduct serious campaigns against it. (54) on cigarette advertisements, plus health warnings on packages and ban on public smoking in certain places, (55) as theaters, cinemas and restaurants, are the most popular tools used by nations in (56) of nonsmokers or in controlling smoking. But world attention is also focusing on another step (57) will make the smoker increasingly self-conscious and uncomfortable about his habit. Great efforts should be made to (58) young people especially of the dreadful consequences of taking up the habit. And cigarette price should be raised.

In the long run, (59) is no doubt that everybody would be much better-off if smoking were banned altogether but many people are not (60) for such drastic action.

57().

A.so 

B.as 

C.which 

D.such

超高层建筑外框架（），多采用电动整体或分片提升脚手架模板工程技术施工。

A、外形复杂

B、模板面积比较小

C、模板面积比较大

D、外形简单