Amy goes to school _____bike.[ ]
A. on
B. in
C. by
答案:C
此病人的治疗原则是
A.给予止痛剂,观察B.给予输液,观察C.给予胃肠减压,观察D.乙状结肠镜明视下减压E.做好术前准备,及早手术治疗
《摇篮曲》演唱时的力度为()
A.弱
B.强
C.中强
D.极强