[单选题]重要线路的桥隧限界每（）检查一遍。
A.一年
B.三年
C.五年
D.十年

[判断题] 中性点不接地运行的变压器,在投入系统前应拉开中性点接地隔离开关。
A.正确
B.错误

[单项选择]

SOLAS公约规定，每次消防演习应包括（）等内容。
Ⅰ．向集合地点报道，并准备执行应急部署表中规定的任务；
Ⅱ．检查是否按应急部署表上的规定携带指定的器材；
Ⅲ．检查消防员装备和其他人员的救助设备；
Ⅳ．起动一个消防泵，要求至少射出两股水柱。

A. Ⅱ～Ⅳ
B. Ⅰ，Ⅱ，Ⅳ
C. Ⅰ，Ⅲ，Ⅳ
D. Ⅰ～Ⅳ

[多项选择]我国《担保法》规定，( )不能够成为保证人。
A. 银行
B. 公民
C. 政府权力机关
D. 政府行政机关
E. 医院

[单选题]依据《电力安全工作规程》变电部分，任何人发现有违反《电力安全工作规程》的情况，应（ ），经纠正后才能恢复作业。
A.批评教育
B.严肃指出
C.立即制止
D.立即汇报

[判断题]接阴角灰线接头，即当灰线扯制完成后，拆除靠尺，切齐甩槎，然后进行每两对应的灰线之间的接头。( )

[不定项选择题]共用题干 Screen Test

1 Every year millions of women are screened with X-rays to pick up signs of breast cancer. If this
happens early enough,the disease can often be treated successfully.According to a survey published last
year,2 1 countries have screening programs.Nine of them,including Australia,Canada,the US and Spain,
screen women under 50.
2 But the medical benefits of screening these younger women are controversial,partly because the
radiation brings a small risk of inducing cancer. Also,younger women must be given higher doses of X-rays
because their breast tissue is denser.
3 Researchers at the Polytechnic University of Valencia analyzed the effect of screening more than
160,000 women at 11 local clinics.After estimating the women's cumulative dose of radiation,they used
two models to calculate the number of extra cancers this would cause.
4 The mathematical model recommended by Britain's National Radiological Protection Board
(NRP B)predicted that the screening program would cause 36 cancers per 100,000 women,18 of them
fatal.The model preferred by the UN Scientific Committee on the Effects of Atomic Radiation led to a lower
figure of 20 cancers.
5 The researchers argue that the level of radiation-induced cancers is"not very significant"compared
to the far larger number of cancers that are discovered and treated.The Valencia program,they say,detects
between 300 and 450 cases of breast cancer in every 100,000 women screened.
6 But they point out that the risk of women contracting cancer from radiation could be reduced by
between 40 and 80 percent if screening began at 50 instead of 45,because they would be exposed to less
radiation.The results of their study,they suggest,could help"optimize the technique"for breast cancer
screening.
7 "There is a trade-off between the diagnostic benefits of breast screening and its risks," admits
Michael Clark of the NRP B.But he warns that the study should be interpreted with caution."On the basis of
the current data,for every 10 cancers successfully detected and prevented there is a risk of causing one later
in life.That'S why radiation exposure should be minimized in any screening program." Early discovery of breast cancer may________.
A.be costly
B.harmful
C.save a life
D.still open to debate
E.reduce the risk of radiation triggering a cancer
F.reduced to the minimum

[单项选择]