正确答案: ABCDE

心交感神经传出冲动减少 血压下降 心率减慢 心迷走中枢紧张性增加 窦神经的传入冲动增加

题目：颈动脉窦压力感受器敏感的人，适当压迫后可以出现（　　）

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学习资料的答案和解析：

[单选题]中国新民主主义革命的中心问题是

农民问题

[单选题]Which of the following is the best title of the article?

根据以下内容，回答下面的题目。Researchers have found that REM (rapid eye movement) sleep is important to human beings．This type of sleep generally occurs four or five times during one night of sleep lasting five minutes to forty minutes for each occurrence．The deeper a person’s sleep becomes, the longer the periods of rapid eye movement．There are physical charges in the body to show that a person has changed from NREM (non-rapid eye movement) to REM sleep．Breathing becomes faster, the heart rate increases, and, as the name implies, the eyes begin to move quickly．Accompanying these physical changes in the body is a very important characteristic of REM sleep．It is during REM sleep that a person dreams．According to the passage, how often does REM sleep occur in one night?

REM Sleep

[单选题]关于肾小管的分泌，下列叙述中错误的是（　　）

NH3是通过主动转运而进入小管液的