强心苷治疗心力衰竭的基本作用是（） A.使已扩大的心脏缩小 B.增强心肌收缩力 C. 发布时间：2017-08-21 09:35 │ 来源：www.tikuol.com 题型：单项选择题 A1型题 问题： 强心苷治疗心力衰竭的基本作用是（）A.使已扩大的心脏缩小B.增强心肌收缩力C.减慢心率D.降低室壁张力E.降低心肌耗氧量
题型：单项选择题 A1型题 完形填空。 Mrs. Yuan is a writer. She is 1 and often helps the poor persons. It was a very cold 2 morning. On the way to her office, she saw an old man 3 on the ground. She came to him and helped him to 4 and bought some water and bread for him. The old man ate up the food quickly and 5 her very much. Then she asked, "Where do you live, Grandpa?" "I have no 6 , madam," said the old man."I have to sleep outside 7 ." "How old are you?" "Ninety-two, madam."Yuan became 8 and went on asking,"Why not live in the old people's house"" 9 I have a son," said the old man."They have 10 admitted (接纳) a person who has children. I have a son." "Where is your son, then?" "He has no children, so the old people's house admitted him." "It's unfair!"said Mrs.Yuan. ( )1. A. strange ( )2. A. snowy ( )3. A. walking ( )4. A. hurry ( )5. A. thanked ( )6. A. farm ( )7. A. at noon ( )8. A. sad ( )9. A. As ( )10. A. never B. kind B. rain B. running B. look up B. hated B. trees B. at night B. sorry B. Because B. always C. terrible C. cloudy C. jumping C. sit up C. liked C. clothes C. every morningC. surprised C. Since C. often D. healthy D. sunny D. lying D. get on D. loved D. house D. one morning D. a number D. While D. sometimes 查看答案
题型：单项选择题 A1型题 某同学在单杠上做引体向上动作时，两臂的张角从10°变到30°，他的手臂受到的拉力将_________，两手臂受到的拉力的合力将__________。（填“变大”、“变小”或“不变”） 查看答案
题型：单项选择题 A1型题 8086和80286都有4个段寄存器CS，DS，SS和ES，它们都是 ______位的，分别是 ______段寄存器、 ______段寄存器、 ______段寄存器和 ______段寄存器。它们用于内存寻址时，20位的物理地址是由段寄存器内容左移 ______位和16位的偏移地址 ______而成。 查看答案