【单选题】【消耗次数:1】
肺泡内液-气界面表面张力形成的回缩力约占总肺回缩力的
1/2
1/3
3/4
2/3
4/5
参考答案:
复制
纠错
相关题目
【单选题】 肺泡内液-气界面表面张力形成的回缩力约占总肺回缩力的
①  1/2
②  1/3
③  3/4
④  2/3
⑤  4/5
【判断题】 肺泡表面活性物质增多时使肺泡回缩力增加。
①  正确
②  错误
【单选题】 这条旋律 “3 4 | 5 6 2 3 | 4 - 1 2 | 3 3 2 2 | 2 1 ||”的节拍为( )
①  2/4
②  3/4
③  4/4
【单选题】 集合{1, 2,3}与集合{2,3,4,5}的交集是( )
①  {1,2,3,5}
②  {1,5}
③  {2,3}
④  {1,3,4,5}
【单选题】 已知inta[4][4]={{1,2},{3},{4},{1,2,3}};问a[2][0]该元素的值是()
①  2
②  3
③  4
④  1
【简答题】 设 A = {1, 2=,2, 4=,3, 3=},B = {1, 3=,2, 4=,4, 2=},则交关系A∩B等于:[填空1]
【单选题】 引起肺泡回缩的主要因素是
①  支气管平滑肌收缩
②  肺泡表面张力
③  大气压
④  肺内压
⑤  胸膜腔内压
【单选题】 引起肺泡回缩的主要因素是
①  支气管平滑肌收缩
②  肺泡表面张力
③  大气压
④  肺内压
⑤  胸膜腔内压
【简答题】 设 A = {1, 2=,2, 4=,3, 3=},B = {1, 3=,2, 4=,4, 2=},则求差关系A-B。
【简答题】 设 A = {1, 2=,2, 4=,3, 3=},B = {1, 3=,2, 4=,4, 2=},则对称差关系A⊕B等于:[填空1]
随机题目
【单选题】 — How about going to the cinema? — ___________
①  Enjoy yourself!
②  Good luck!
③  Sounds like a good idea!
④  very happy
【单选题】 — Could you please help me choose an Mp4 player online?— ________. My computer doesn’t work.
①  I don’t agree
②  I hope so
③  I’m afraid I can’t.
④  i did
【单选题】 Translation : Parents are too busy to spend time teaching their kids right from wrong.
①  父母不会太忙,所以有时间教导孩子明辨是非。
②  父母都太忙,没有时间教导孩子明辨是非。
③  父母很忙,但是也抽时间教导孩子明辨是非。
④  父母很忙,经常抽时间教导孩子明辨是非。
【单选题】 He is worth ____________.
①  trust
②  trusted
③  trusting
④  have trusted
【单选题】 一Brand was Jane’s brother!— he reminded me so much of Jane!
①  No doubt
②  Above all
③  No wonder
④  how
【单选题】 -________ keep water running when you are brushing your teeth or washing your hands, Jack.  -OK. I know we must save every drop(滴) of water.
①  Please
②  Why not
③  Don’t
④  do
【单选题】 You’d better ________ to hospital at once.
①  go
②  to
③  going
④  gone
【单选题】 ________, the number of private cars will increase sharply in the coming couple of years.
①  Undoubtedly
②  Doubtedly
③  Undoubted
④  doubt
【单选题】 The more people you know, ___________ knowledge you get.
①  the much
②  the more
③  more
④  much
【单选题】 1.-It’s rather cold in here. Do you mind if I close the window? -_____________________.
①  Yes, please
②  No, go ahead
③  Sure, please
④  yes