问题
单项选择题
地高辛的正性肌力作用主要是由于()。
A．激动心肌细胞卜的β1受体
B．增加心肌细胞膜反应性
C．抑制细胞膜结合的Na+-K+-ATP酶，使细胞内Ca2+增加
D．直接兴奋心脏上的交感神经
E．反射性兴奋交感神经
答案
参考答案：C
解析：[知识点] 强心苷类药物—地高辛的作用机制
搜题请搜索小程序“爱下问搜题”
地高辛的正性肌力作用主要是由于()。
A．激动心肌细胞卜的β1受体
B．增加心肌细胞膜反应性
C．抑制细胞膜结合的Na+-K+-ATP酶，使细胞内Ca2+增加
D．直接兴奋心脏上的交感神经
E．反射性兴奋交感神经
参考答案：C
解析：[知识点] 强心苷类药物—地高辛的作用机制
| 完形填空。 | ||||
| "What's the matter, mum?" As soon as I enter the door, I find that my mother is 1 . It's unusual-she usually opens the door and welcomes me with 2 . "She's dying," mum says sadly. I 3 what she says. The tulip (郁金香), mother's favourite, is dying. A month ago, we 4 into our new house and mum bought a very beautiful tulip. Mum liked it very much. 5 she was free, she would sit in her armchair beside the tulip and 6 its beautiful colour and inviting (诱人的) smell. She 7 it like a baby and looked after it 8 . She put the tulip by window and moved it from one place to another to give the tulip enough 9 . The first thing she did when she 10 every morning was to water the tulip. Mum also fertilized (施肥) it many times. She hoped that 11 great care, the tulip would become more and more beautiful and 12 . But the tulip was dying because of 13 sunshine, water and fertilizer. It's 14 that mother loved the tulip. But this kind of love can be 15 . Love can sometimes kill what you love. | ||||
|