呕吐严重且呕吐量大的是()。
A.胃炎
B.幽门梗阻
C.胃溃疡
D.胆石症
E.肝炎
参考答案:B
旅游者的满足程度要受到其主观因素影响,也就是受其( )的影响。
A.社会地位
B.消费偏好
C.收入水平
D.闲暇时间
A circular rim 28 inches in diameter rotates the same number of inches per second as a circular rim 35 inches in diameter. If the smaller rim makes x revolutions per second, how many revolutions per minute does the larger rim make in terms of x ?()
A.A
B.B
C.C
D.D
E.E