为避免在浇筑混凝土过程中产生冷缝,最主要的措施是( )。
【单选题】
在体内可被代谢产生2-苯基丙烯醛,易与蛋白的亲核基团发生迈克尔加成,产生特质性毒性的药物是( )
A.
沙丁胺醇
B.
肾上腺素
C.
非尔氨酯
D.
吲哚美辛
E.
醋磺己脲
参考答案
参考解析
【单选题】
What purpose do post-listening activities NOT serve?
Helping students relate the text with their personal experience.
Offering students the opportunities of extending other language skills.
Practicing students' ability of matching the pre-listing predictions with contents of the text.
Enabling students to have a discussion about the topic.