脊髓骶节
A.有薄束和楔束 B.有楔束无薄束 C.没有皮质脊髓侧束D.没有皮质脊髓侧束 E.有副交感神经节前神经元
参考答案:E
用化学用语表示下列物质:
(1)氧化钙 ______,氯化钡溶于水电离出的离子 ______.
(2)1个氮分子 ______.
(3)某氮的氧化物中氮元素的化合价为+1价,该氧化物是 ______.
Tom has to go to school on foot every day, _____? [ ]
A. isn't he
B. weren't he
C. doesn't she
D. doesn't he