考研考试

根据网考网考试中心的统计分析，以下试题在2019/9/8日考研习题练习中，答错率较高，为：35%
【单选题】The safety of mobile phones (U. S. cell-phones) seems to face new questions afterBritish researchers found that microwave emissions can affect the health of earthworms in unexplained ways.
The larvae of tiny soil worms called nematodes grew faster and became more (1) after they were (2) for a long time to weak microwave radiation, of the (3) strength and frequency as that (4) by mobile phones, they founD、
Why this occurred is (5) , and there is no evidence that human health is also affecteD、But, they warn, the finding challenges the standards which (6) whether a mobile is safe or not.
These standards are based on whether the radiation is strong enough to cause a batch of (7) to warm up. Heat causes the chemical bonds in cells to (8) , a disruption that can be a potential (9) for cancer.
The research, led byDavid de Pomerai at Nottingham University, centralEngland, said larvae exposed to the microwaves (10) between eight and eleven percent faster than (11) which had not been exposeD、
In addition, the (12) of worms that (13) into egg-bearing adults was 28～40 percent higher.
By comparison, worms that had been exposed to (14) heat suffered a 10-percent reduction in their growth rate, and (15) none developed into fertile adults.
The experiment is important because it suggests that microwaves might trigger biological effects. (16) warming any tissues.
The scientists do not (17) out the possibility that radiation could cause hot-.spots to occur somewhere in the worm that then affected cell (18) .
The worry, though, is that the 19 basis for determining mobile safety is whether microwaves cause heating in bulk tissue rather than just at (20) in it, they note.
A．adequate
B．fertile
C．ample
D．multiple

网考网参考答案：B，答错率：35%
网考网试题解析：
[解析] 语义衔接题。本句是描述科学家实验的结果。tiny soil worms在与手机释放的能量相同的microwave radiation的影响下，会grow faster，根据文意可判断，本题需要选择一个描述身体机能的词。而选项中只有[B]表示“繁殖力增强”，符合题意。而[A]“足够的，适当的”、[C]“充足的，广大的”、[D]“多重的，多样的”，都不合题意。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>