对中枢化学感受器的描述,下列选项正确的有 ( )

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

查看答案

From the first paragraph, we learn that ______.

From the first paragraph, we learn that ______.A. the number of prisoners in America is increasingB.

查看答案

Passage Two America put more people in prison in the 1990s than in any decade in

Passage TwoAmerica put more people in prison in the 1990s than in any decade in its history. That sta

查看答案

根据以下选项,回答 91~92 题: 某患者,因大呕血入院,对于患者的下述病情应分别归于哪类病史

根据以下选项,回答 91~92 题:某患者,因大呕血入院,对于患者的下述病情应分别归于哪类病史A.10年前阑尾切除术B.吸烟20年C.父亲10年前死于肝癌D.4年前被诊断为乙肝后肝硬化E.近半年明显消瘦

查看答案

We can assume from the passage that ______.

We can assume from the passage that ______.A. red beards were more fashionable than black onesB. ever

查看答案