脐动脉sd比值4.8-5.4

I go to bed at nine o'clock in the evening.这句话里,atnine o'clock 和in the evening 两个短语能互换一下位置么?为什么 I usually go_bed at nine o'clock in the evening.I usually go 和bed at nine o'clock in the evening.中间的横线上应该填啥? can you tell me__? A.where Linda was B.Where is Linda C.where was Linda D.where Linda is 选哪个?求解释~ ----Can you tell me -----she is in the computer lab.A.where Linda was B.where is LindaC.where was Linda D.where Linda is Linda,could you tell me__?He is an actor A what he does B what does he do C where he works 要理由 西班牙语用英语怎么说十万火急啊 关于延续性动词完成时的问题He has stayed there for 2 years.He stayed there for 2 years这两句话有什么区别? You must finish____ (do )your homework before nine o'clock.空格应该填? He must finish his homework before 9 o'clock.用finish his homework提问What__ he __ before 9 o'clock I must finish my homework before eight o`clock.(变一般疑问句)怎么做?速度! be,must,by,home,we,6 o'clock(.)怎样连词成句? The boys are playing soccer happily in the park now.的同义句 He must (finish his homework) before 9 o'clock.对括号里的词提问.What he before 9 o'clock? the boys are playing soccer on the playground.------------------ 对画线部分提问晚自习马上要交了 the boys are playing soccer.（对划线部分提问） Excuse me,but can you tell me where the teacher's pffice is?Just a minute.I'll have Bob____(show) you there.是office Excuse me,could you tell me where the ________ room is?(twin) 音标中28个辅音20个元音分别是什么 Did the black bear talk to Jack?这句话用英语该怎么回答 这段话用英文和西班牙文怎么说重要的不是你想过和说过什么,而是你做过和没做过什么. Look at the children .They are playing soccer.这句话的同义句, They are playing games.They are very ____(relax) i_(leave) in a minue.i_(finish) all my work before i_(leave)这是很难得英语的练习题, ==The children are playing--- They look very --- ==So they areA happy;happy B happily‘happily C happy ；happily D happily ；happy I____(leave) in a minute.I____(finish) all my work before I____(leave) The boys are playing soccer on the beach(对 are playing soccer 提问) I am leaving in a minute.I will finish all my work before I_____(leave).before是不是介词?后面是加 v.ing 为什么有“I”和没“I”答案不一样？ finish the job还是work 有区别吗 音标的辅音元音表急用!就是哪些音标是辅音!那些是元音! What does he want to be when he when he grows up?急 What does he want to be when he grows up?快 I have finished my home WORK .对 finished my home WORK.进行提问?该怎么说