after a 21 hours'/21-hour trip to space选择的原因

after a 21 hours'/21-hour trip to space选择的原因 after-hours The farmers went on working,_____ A.hours after hours B.hour after hour C.an hour after an hour After a three hours ' long walk ,zhe boys look rether after working for five hours,he()a rest After Hours 歌词 MODE AFTER HOURS怎么样 He felt a little sleepy after long hours'work.(改为同义句）He was__ __sleepy after long hours'work. 200分求一道物理题 求懂英文高手解答Suppose that we have 39936 atoms of a radioactive substance with a half-life of 3 hours. a. How many atoms of that element remain after 15 hours?Answer= 多少atomsb. How many atoms remain after 21 after-hours 还有after-hours on request是什么意思? After class,Ihave volleyball____two hours. after hours什吗意思? 下班后 AFTER HOURS怎么样 After hours bus service是什么意思. 关于名词所有格的问题Jill wants to have a rest after three ______ woek.A.hour's B.hours C.hours' D.hours's I want to have a rest after three ___ work.(hours/hours') 选哪个 谢谢,请说明下原因,谢谢! After _____ time,he finished his homework,A two hour's B two hours' C one hours' D one hour I caught a fish after waiting for many hours的同义句改成I caught a fish after ___________ ___________ __________many hours形式