我国采用胶接方法以提高钢轨接头阻力的接头是（）。A、绝缘接头 B、焊接接头 C、冻结 发布时间：2017-07-11 09:34 │ 来源：www.tikuol.com 题型：单项选择题 问题： 我国采用胶接方法以提高钢轨接头阻力的接头是（）。A、绝缘接头B、焊接接头C、冻结接头D、尖轨接头
题型：单项选择题 下列关于阿片类镇痛药物的分类，描述错误的是（）A.吗啡、美沙酮、羟考酮均属于阿片受体完全激动剂B.部分受体激动-拮抗剂可以与吗啡合用C.阿片受体阻断剂可以用于阿片类药物过量的抢救D.哌替啶、芬太尼均属于人工合成的阿片类药物E.喷他佐辛属于部分受体激动-拮抗剂 查看答案
题型：单项选择题 根据对话内容，选择恰当的句子补全下列对话。A. Yes, I've got a map. B. Neither will I.C. That's a good idea. D. Ye, that's right. E. What do you know about it?F. What kind of animal will we see there? G. What kind of animal do you like best?A: We have to meet the others at 8:30 at the reserve (自然保护区), don't we? B: 1_______ A: Do you know how to get there? B: 2_______ It will take us about two hours to get there by bus. A: 3_______ B: It's an area that protects lots of different animals. A: 4_______ B: I'm not really sure. I know there are many different kinds of birds there and I'm going to take my camera with me. A: 5_______ What clothes are you going to wear? B: Well, if it's wet, I will wear my strong shoes and take my raincoat with me.A: So will I. 查看答案