高炉冶炼要求入炉烧结矿中＜5mm的粉末量应少于（）。
A.20%
B.10%
C.5%
参考答案：B
Paul is very proud ______ his father because he helps keep our city beautiful. [ ]
A. in
B. of
C. on
D. from
N10G01XYF，后面程序段中使用（）指令才能取代它。
A、G92
B、G10
C、G04
D、G03
