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单选题公共英语三级

2018-02-01

第（45）题选

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参考答案

B

答案解析

最后一段第一句说本地报纸通常不对国家的重大问题发表评论，但空格处后面却提到有时候它们能够说服本地的理事会采取一些行动，可见此处需要选一个可以表示转折的句子，故选B。

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1 根据下面资料，回答题
So many people use the cell phone so frequently every day. But（46）little is certain about the health effects of its use. Manufacturers（47）that cell phones meet government standards for safe radio frequency radiation emission, but enough studies are beginning to document a possible（48）in rare brain tumors (肿瘤), headaches and behavioral disorders in children to cause concern. So far, the evidence isn´（49）on whether the use of cell phones（50）to any increased risk of cancer. In a new trial, researchers asked 47 volunteers to（51）in a project to measure glucose(葡萄糖) consumption in the brain by scanning the brain to see how cells use energy. For both 50 minute scans, the volunteers had a cell phone（52）to each ear.
During the first scan, the devices were turned off but for the second scan, the phone on the right ear was（53）on and received a recorded message call, although the volume was muted( 消音) so the noise wouldn´ t bias the results. The results of the second scan showed that the（54）of the brain nearest to the device had higher rates of glucose consumption than the rest of the brain.
The study shows that cell phones can change brain activity, and（55）a whole new avenue for scientific inquiry, though it doesn´ t say anything about whether cell phone radiation can cause cancer.
A．conclusive
B．contributes
C．derive
D．expresses
E．fixed
F．immensely
G．increase
H．maintain
I．mission
J．participate
K．particular
L．provides
M．regions
N．surprisingly
O．Switched
第（46）题选

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2 第（47）题选

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3 第（48）题选

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