不是心力衰竭代偿机制的是（） A.Frank-Starling机制 B.心肌肥厚 C 发布时间：2017-06-08 16:44 │ 来源：www.tikuol.com 题型：单项选择题 A1/A2型题 问题： 不是心力衰竭代偿机制的是（）A.Frank-Starling机制B.心肌肥厚C.交感神经兴奋性增强D.RAS激活E.心肌耗氧增加
题型：单项选择题 A1/A2型题 完形填空。 A long time 1 people thought the sun went round the earth. In some countries people even said that thesun was a god (神). They thought that he drove across the sky every day 2 a golden horse. Now they know the earth goes round the sun. It 3 the earth a year to go all the way round the sun. Today men even know 4 it is for theearth to go round the sun. They 5 us that the earth travels over a thousand miles a minute on its way roundthe sun. The sun is really a star. It's 6 bigger than the earth and it is very hot. Some people have been to the moon. 7 no one can 8 to the sun. It's 9 hot for people to live anywhere near it. The sun is three hundred 10 times heavier than the earth and more than a million times larger. ( )1. A. before ( )2. A. on ( )3. A. uses ( )4. A. how long ( )5. A. tell ( )6. A. many ( )7. A. Or ( )8. A. live ( )9. A. too ( )10. A. thousands B. ago B. by B. spends B. how much B. say B. much B. So B. leave B. very B. thousand C. front C. with C. takes C. how many C. talk C. a lot of C. And C. go C. much C. thousand of D. once D. in D. brings D. how far D. speak D. more D. But D. pass D. more D. thousands of 查看答案
题型：单项选择题 A1/A2型题 将植物细胞的结构与其相适应的作用，用线连接起来。①细胞壁a．保护和控制物质进出②细胞膜b．保护和支持③细胞质 c．细胞生命活动的控制中心④细胞核d．能流动、加速细胞内、外物质交换⑤叶绿体e．内含细胞液⑥线粒体f．制造有机物的场所⑦液泡 g．进行能量转换 查看答案