商业组织的域名后缀是什么（）
A.int
B.edu
C.com
D.gov
E.org
参考答案：C
The poor mother when she heard the news that her only son had been killed by the enemies.
A．broke out
B．broke down
C．broke up
D．broke off
手拉葫芦的起重量最大可达20吨。
