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【单选题】
缺氧引起呼吸兴奋,是通过A.
刺激中枢化学感受器转而兴奋呼吸中枢
B.
直接刺激呼吸中枢
C.
刺激颈动脉体和主动脉体化学感受器
D.
刺激右心房容量感受器
E.
呼吸肌本体感受性反射活动
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知识点：
皮皮学刷刷变学霸
举一反三
【简答题】74LS160的计数条件是（）A. ET=0EP=0B. ET=0EP=1C. ET=1EP=0D. ET=1EP=1
【简答题】用所给词补全对话。 get, wake, it's, I'm, is, what, M: 1 up , Peter. It's time to 2 up. P: 3 time is it, Mum? M: 4 seven o'clock. P: Oh, I'm late. M: Hurry up. Breakfast 5 ready. P: Ok,6 coming.
【单选题】S1:How is the cable leading? S2:The cable is leading up and down. Q:What's the state of the cable?
A.
It's growing slack.
B.
It's growing tight.
C.
It's leading round the bow.
D.
It's leading up and down.
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