当饮料体积在200-1000mL之间时，净含量标注的最小字符高度为（）。
A.2
B.3
C.4
D.6
参考答案：C
It _____ have been Tom that parked the car here, as he is the only one with a car. [ ]
A. may
B. can
C. must
D. should
混合编程的程序段是_________。
A．G0 X100 Z200 F300
B．G01 X－10 Z－20 F30
C．G02 U－10 W－5 R30
D．G03 X5 W－10 R30 F500
