
【名词&注释】
脑脊液(cerebrospinal fluid)、中枢化学感受器(central chemoreceptor)、氢离子(hydrogen ion)、另一种(another)
[判断题]随着生态演替的发展,正相互作用增加负相互作用减少。( )
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举一反三:
[单选题]No matter how far it is, American people tend to go back home for Christmas to ______.
A. eat puddings
B. drink wine
C. get lots of gifts
D. enjoy the family care and love
[单选题]Managing is the process of getting things _________by and through others.
A. done
B. do
C. doing
D. did
[多选题]对中枢化学感受器的描述,下列选项正确的有 ( )
A. 对脑脊液中的氧张力的变化敏感
B. 对血液中氢离子的浓度变化非常敏感
C. 存在于延髓呼吸中枢
D. 对脑脊液中氢离子的浓度变化非常敏感
E. 动脉血中C02张力增高,可间接刺激中枢化学感受器
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