The local government has always placed a strong emphasis ________education and vocational training.
查看答案
Don’t take the wrong turn before you ________the railway station.
A. reach
B. run
C. keep
The team doesn’t mind ________at weekends as long as they can finish the task.
A. worked
B. working
C. to work
强心甙治疗心房纤颤的主要机制是（）
A. 降低窦房结自律性
B. 缩短心房有效不应期
C. 减慢房室结传导
D. 降低浦肯野纤维自律性
E. 以上都不是
强心甙中毒与下列哪项离子变化有关（）
A. 心肌细胞内K+浓度过高，Na+浓度过低
B. 心肌细胞内K+浓度过低，Na+浓度过高C.心肌细胞内Mg2+浓度过高，
Ca2+浓度过低
D. 心肌细胞内Ca2+浓度过高，K+浓度过低
E. 心肌细胞内K+浓度过高，Ca2+浓度过低
微信支付 
支付宝支付