数控车床刀具补偿有（）。
A.刀具半径补偿
B.刀具长度补偿
C.刀尖半径补偿
D.A，B两者都没有
参考答案：C
体温每下降1℃，肾小球滤过率约下降（）
A.1.3%
B.2.3%
C.3.3%
D.4.3%
E.5.3%
Our school is _____ middle school in our city. [ ]
A. the second large
B. the second largest
C. the first large
D. one of the largest
