关于异丙肾上腺素的叙述,正确的是(). A.显著收缩肾血管 B.舒张肾血管 C.舒张 发布时间:2019-02-12 02:55 │ 来源:www.tikuol.com 题型:单项选择题 A1型题 问题: 关于异丙肾上腺素的叙述,正确的是().A.显著收缩肾血管B.舒张肾血管C.舒张骨骼肌血管D.有中枢兴奋作用E.抑制心肌收缩力
题型:单项选择题 A1型题 某同学设计了右图所示的装置探究铁锈蚀的条件.a管中装入少量煮沸的蒸馏水,b管中是干燥的空气.调节L端与R端的液面高度一致,塞紧木塞.一段时间后观察.下列推断错误的是( )A.只有a管中的铁钉会锈蚀B.L端与R端的液面高度仍然保持一致C.该实验说明铁的锈蚀与空气和水有关D.常温下b管中的铁钉很难锈蚀 查看答案
题型:单项选择题 A1型题 — Peter didn't come to the meeting this morning. —I _____ him yesterday, but I was too busy and forgot it. [ ]A. should tell B. should have told C. had to tellD. had told 查看答案