问题
多项选择题
微粒在液体介质中的沉降将受其他因素的影响,这些因素包括()
A.介质的浮力
B.介质的阻力
C.扩散现象
D.压力
E.空气的阻力
答案
参考答案:A, B, C
微粒在液体介质中的沉降将受其他因素的影响,这些因素包括()
A.介质的浮力
B.介质的阻力
C.扩散现象
D.压力
E.空气的阻力
参考答案:A, B, C
根据对话情景和内容,从对话后所给的选项中选出能填入每一空白处的最佳选项组合。选项中有两个为多余选项。 (Alice advises(劝告)Bill to read English every day and agrees to help him ...) Alice:Why don 't you look happy ? Bill:Because I have a lot of trouble with my English.I can hardly pass the exam every time. 6 Alice:Don 't worry. 7 Bill:No,I only read English before the exam. Alice:Ah,that's it.If you want to study it well,you must practise it every day. 8 Bill:I'll take your advice and try to practise reading English every day. 9 Alice:All right.I'd like to.But in fact I still have some trouble with English,too. 10
A:6-⑤;7-⑦;8-⑥;9-①;10-②; B:6-⑥;7-⑦;8-①;9-②;10-③; C:6-①;7-②;8-④;9-⑦;10-⑤; D:6-③;7-①;8-⑥;9-②;10-⑤; |