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【单选题】
机床开动前，必须观察（）动态。A.
局部
B.
周围
C.
正面
D.
整体
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【单选题】Scientists have shown that there is a connection ____ cigarette smoking and certain diseases.
A.
with
B.
between
C.
to
D.
for
【简答题】The cigarette ads which claim that smoking can help soothe anxiety__________.
【单选题】In the 1950's accumulating scientific evidence linking cigarette smoking and lung cancer made a (51) impact (52) the smoking public. During this period many health agencies declared smoking to be a (5...
A.
co-ordinate
B.
distinct
C.
miraculous
D.
principal
【简答题】Medical scientists have long recognized that heart disease is linked to cigarette smoking．
【单选题】Cigarette smoking is believed by most research workers in this field to be an important factor in the development of cancer of the lungs and the throat and is believed to be related to cancer of the b...
A.
male smokers smoke more than female ones
B.
male smokers are more likely to be affected by smoking
C.
male smokers breath in the smoke deeper than female ones
D.
male smokers are more likely to be affected by other factors in envionment
【单选题】家用电能表标有 “1500r/kWh”的字样,若只有一台录音机工作,测得电能表转盘旋转一周的时间恰好为100秒,则这台录音机的电功率为
A.
8瓦
B.
15瓦
C.
20瓦
D.
24瓦
【单选题】家用电能表标有“1500r/kWh”的字样,若只有一台录音机工作,测得电能表转盘转一周的时间恰好为100秒,则这台录音机的电功率为
A.
8 瓦
B.
15 瓦
C.
20 瓦
D.
24 瓦
【简答题】2009年2月27日，在上海某基础公司总承包、某建设分承包公司分包的轨道交通某车站工程工地上，分承包单位进行粧基旋喷加固施工。5时30分左右，1号粧机(井架式旋喷桩机)机操工王某，辅助工冯某、孙某三人在C8号旋喷桩基施工时，辅助工孙某发现粧机框架上部6m处油管接头漏油，于是在未停机的情况下，由地面爬至框架上部去排除漏油所以障(桩机框架内径650mm*350mm)。由于下雨湿滑，孙某爬上机架后不慎身...
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