判断胃气的存亡，是依据舌苔______。察舌的神气，以舌色______为辨别要点。
参考答案：有根与无根 是否“红活”
With five hungry children seated round the table, the food disappeared________.[ ]
A. in no time
B. at one time
C. at the same time
D. on time
数控机床的F功能常用（）单位。
A、m/min
B、mm/min或mm/r
C、m/r
