在晶体二极管的反向截止区、反向电流随反向电压的增大而迅速增大。（）
参考答案：错
1021至少加上一个整数______就能被3整除．
Friends are those _____make you smile, always open their hearts to you and encourage you to succeed. [ ]
A. which
B. what
C. whom
D. who
