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【简答题】
转眼初中学习生活已经过了一学期,从开学到现在,在生物课上,你学习了“_______________”、“生物和细胞”、“__________________”等三个单元中的知识。
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【单选题】下列诗篇中,托物言志,表达忧国忧民心情的咏物之作是
A.
《陌上桑》
B.
《蒹葭》
C.
《早雁》
D.
《归园田居(其一)》
【单选题】下列诗篇中,托物言志,表达忧国忧民心情的咏物之作是
A.
《蒹葭》
B.
《陌上桑》
C.
《归园田居(其一)》
D.
《早雁》
【单选题】如图2-5所示的桥式整流电容滤波电路,v2的有效值为20V,则RL两端直流电压Vo (   )
A.
28V
B.
24V
C.
18V
D.
9V
【简答题】Only one-tenth of the cells in your body are really you. The rest are _______ An experiment found that animals that did not have bacteria __________ or had to have a special diet. There are ________ o...
【简答题】Human body diseases vary in both severety and diversity. Any body part or function can contract a disease or have a disorder. We are more capable of fighting these diseases today than ever before and ...
【简答题】We all have offensive breath at one time or another. In most cases, offensive breath emanates from bacteria in the mouth, although there are other more causes. Until a few years ago, the most doctors ...
【单选题】Each mRNA molecule is eventually degraded into nucleotides by ribonucleases (RNAses) present in the cytosol, but the lifespans of mRNA molecules differ considerably—depending on the nucleotide sequenc...
A.
10
B.
20
C.
30
D.
45
【简答题】Microorganism affect the well-being of people in a great many ways and occur in large numbers in most natural environments. They may be tiny, but the relative new science of microbiology is huge! Prok...
【判断题】十月战争中,中东阿拉伯国家以石油为武器,迫使西方国家调整了对其的政策。()
A.
正确
B.
错误
【简答题】Matching (1) optimum (a) taking a vaccine as a precaution against contracting a disease (2) inoculation (b) enzyme found in most plant and animal cells that functions as an oxidative catalyst; decompo...
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