在SSL握手协议过程中，需要服务器发送自己的证书。
参考答案：对
—Tom, what do you want to do this weekend?
—I ______ a picnic with my family in the country.
A. have B. are having C. will have
锉削圆弧半径较小时，使用（）锉。
A.平
B.圆
C.半圆
D.方
