用杀虫剂控制苍蝇孳生地时,常用的杀虫剂对()、()均无效。
参考答案:卵、蛹
给肌松药后骨骼肌的松弛有一定规律,下列哪项描述正确()
A.眼轮匝肌肉-膈肌-肋间肌-四肢肌肉
B.眼轮匝肌肉-四肢肌肉-膈肌-肋间肌
C.眼轮匝肌肉-肋间肌-四肢肌肉-膈肌
D.眼轮匝肌肉-上肢肌肉-肋间肌-膈肌
E.眼轮匝肌肉-肋间肌-膈肌-四肢肌肉
Suppose a foreign friend of yours has written to inquire about the possibility of making a seven-day visit in China. Write a reply to give him some information. The following should be included: (1) The place you recommend for him to visit and the reasons ; (2) The suggested route and the timetable of the visit; (3) Some advice on how he should prepare for the visit; (4) Your arrangement for his visit to Beijing.