采用纵包管方式对蝶形引入光缆进行包扎保护，主要在光缆穿越墙洞、障碍物以及与其它线缆交叉处使用。
参考答案：错
About 70 percent of the population ______ in that country in the mountains and only 30 percent of its land ______ farmland.
A．lives; are B．live; areC．live; is D．lives; is
I want to _________ a picture![ ]
A. take
B. look
C. book
D. table
