架空线防雷击的基本措施（）
A、并联电抗器
B、架设避雷线
C、降低杆塔接地电阻
D、串连电抗器
参考答案：B, C
______ all the students in his class, Xiao Ming writes ______. [ ]
A. Of, most carefully
B. In, the most carefully
C. Of, very carefully
D. In, much more carefully
“谈笑有鸿儒，往来无白丁”中的“白丁”指的是没有学问的人。
