机泵选用润滑油主要根据机械本身使用性能而定，转速越高，选用润滑油的粘度越（）
参考答案：低
Tony ________ thirsty. He ________ eat any more pizza. [ ]
A. is, shouldn't
B. has, shouldn't
C. is, can't
D. has, can't
F-C开关中高压熔断器的作用？
