膜内Na+向膜外转运是由于（） A.安静时膜对Na+通道开放 B.兴奋时膜对Na+通 发布时间：2017-08-22 16:55 │ 来源：www.tikuol.com 题型：单项选择题 A1型题 问题： 膜内Na+向膜外转运是由于（）A.安静时膜对Na+通道开放B.兴奋时膜对Na+通道开放C.Na+经通道易化扩散的结果D.膜上Na+-K+泵的作用E.膜上ATP的作用
题型：单项选择题 A1型题 完形填空。 My dream is to be the first woman president (总统) of the United States when I grow up. Why? I want to show that girls can be just as __1__ as boys. My brother has the same__2__ . He wants to be a president right after me. One important __3__ it takes to be president is self-discipline (自我约束). Why is self-discipline important? What will happen if your parents don't __4__ your grades? Will you work less hard or push (推动) __5__ to do more? During my nine years in school I have __6__ been told that 100% is good enough (足够的). 100% is good; 110% is better. 120% is much __7__ . I have got straight A's (全 优) __8__ I moved to Bedford. The good grades are a reward (奖励) for my work. __9__ important quality is flexibility (随机应变). I have __10__ sides. One side is gentle and the other is tough. These two sides are both important to me. I have to know when __11__ hard and gentle. I'm the only __12__ in kung fu class but the boys respect (尊重) me __13__ they know I am as tough (坚强的) as any boy. Having a dream is really a good thing. It can help us to grow up and make our life __14__. I will never __15__ up. My dream will come true when I grow up. ( ) 1. A. handsome(英俊的)( ) 2. A. hobby ( ) 3. A. problem ( ) 4. A. worry about(担心?( ) 5. A. myself ( ) 6. A. often ( ) 7. A. better ( ) 8. A. until ( ) 9. A. Other ( ) 10. A. two ( ) 11. A. been ( ) 12. A. student ( ) 13. A. so ( ) 14. A. colorful ( ) 15. A. grow B. humorous(幽默的B. dream B. question B. take care of B. himself B. usuallly B. best B. since B. Another B. three B. was B. teacher B. because B. boring B. get C. important C. opinion C. quality (品性) C. care about(在意,关心) C. herself C. always C. good C. before C. The other C. four C. be C. girl C. or C. tiring C. put D. healthy D. interest D. lifestyle D. show interest in D. yourself D. never D. well D. while D. Each D. five D. to be D. woman D. then D. dull D. give 查看答案
题型：单项选择题 A1型题 在临床医学研究中，对待受试者的正确做法是（）A.对受试者的负担不可以过分强调 B.对受试者的受益要放在首要位置考虑 C.对受试者的负担和受益要公平分配 D.需要特别关照参加试验的重点人群的利益 E.对参加试验的弱势人群的权益可以不必太考虑 查看答案