在数字电表实验中，校准一个特定量程时至少需要两点，分别为零点调节和（）
A.参考点调节
B.中点调节
C.量程校准
D.漂移补偿
参考答案：C
将单词按画线部分的读音归类。
1. when______________________________
2. who_______________________________
3. write_______________________________
The reason she can finish the homework ahead of time is she is both clever and hard-working.
A．why;why
B．why;that
C．that;because
D．for;because
