【简答题】化学与生活息息相关,我们的衣食住行都离不开化学。 (1)下列服装所使用的材料中,属于有机合成材料的是___________(填字母序号) A纯棉帽子 B.羊毛衫 C.涤纶运动裤 (2)人们通过食物获取各种营养。 ①水果和蔬菜富含的营养素是___________,该营养素可以起到调节新陈代谢等作用。 ②为了防止骨质疏松,人体每天必须摄入足够量的_...
【单选题】What about going for picnic this weekend? - .
【单选题】感染新冠病毒后会诱发严重肺炎,导致呼吸衰竭而亡。下列何种因素与病毒感染肺部有关?
C.
病毒表面蛋白与肺部表达ACE2蛋白能够特异结合,导致严重感染
【简答题】(6分)化学与生活息息相关,我们的衣食住行都离不开化学。 (1)下列服装所使用的材料中,属于有机合成材料的是________(填字母序号)。 A.纯棉帽子 B.羊毛衫 C.涤纶运动裤 (2)人们通过食物获取各种营养素。 ①水果和蔬菜富含的营养素是________,该营养素可以起到调节新陈代谢等作用。 ②为了防止骨质疏松,人体每日必须摄入足够量的________元素。 (...
【单选题】--- What are you going to do tomorrow ? ----How about going to buy Michael Jackson CDs? ----- ______________
【单选题】Documents against payment (D/P) includes D/P at sight and _______ . A. D/P after sight B.D/A at sigh t C. D/ A after sight D. pay at sight
【判断题】某学科文献半衰期越短,说明该学科发展的越慢:
【单选题】What is the government going to do about day nurseries?
A.
They are going to build more day nurseries.
B.
They are going to close down some nurseries.
C.
They are going to decorate the nurseries more beautifully.
D.
They are going to better the conditions of the day nurseries.