皮皮学，免费搜题
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【单选题】
缺O2对呼吸的兴奋是通过:A.
直接刺激呼吸中枢
B.
刺激中枢化学感受器
C.
刺激外化学感受器
D.
刺激颈动脉、主动脉弓压力感受器
E.
通过脑内H+增多间接兴奋中枢化学感受器
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反馈参考答案：
举一反三
【单选题】In the reviewer's opinion, Sunday's Children
A.
is a cinematic first.
B.
has an original and interesting script.
C.
is visually and emotionally depressing.
D.
surpasses Bergman's previous work.
【单选题】Ram asked me where I worked. His original words were
A.
"Do you work there?"
B.
"Where do I work?"
C.
"Where do you work?"
【简答题】I (original) intend to catch the earliest train, but I got up late.
【单选题】I always have a difficult time choosing original birthday presents. My imagination never seems to get beyond ties, handkerchiefs, or pairs of socks. But, strangely enough, it did not take me long to d...
A.
Ties.
B.
Books.
C.
Handkerchiefs.
D.
Pairs of socks.
【简答题】I want to buy a friend an original present.
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