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【单选题】
The reason why the rock was hard to get down was that ______.A.
it had been worn smooth
B.
there was no grass on it
C.
it, was wet and slippery
D.
it was soft and sandy
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举一反三
【简答题】Researchers hope to begin ______.
【单选题】将蛋白质溶液的pH值调至其pI时
A.
蛋白质稳定性降低
B.
蛋白质稳定性增加
C.
蛋白质表面的净电荷增加
D.
蛋白质表面的净电荷不变
E.
对蛋白质表面水化膜无影响
【简答题】Compared with MBARI researchers， the Scripps researchers paid more attention tothe influence of overfishing on sardine population. 查看材料
【多选题】What are the purpose to organize and train researchers?
A.
Make researchers get more familar with research objective.
B.
Make researchers feel more comfortable with research environment.
C.
Make researchers get more familar with research process.
D.
Make researchers get more familar with research methods.
【单选题】Who is to blame besides biofuels?
A.
The ICSU researchers.
B.
Previous researchers.
C.
The IPCC researchers.
D.
Global governments.
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