带式输送机的原动力是()。
A.变压器
B.电动机
C.输送带
D.减速机
参考答案:B
There_____a football game between China and Japan tomorrow.[ ]
A. has
B. is going to be
C. will have
D. is going to have
泌尿系肿瘤最主要的临床特点是()
A.无痛性全程血尿
B.尿频和尿痛
C.排尿困难
D.腹部肿块
E.尿失禁