题干
The Somali robbed frequent attacks on the sea urged the United Nations to_____all nations to take immediate action.
A：fight for
B：apply for
C：call o
D：wait o
答案(点此获取答案解析）
C
2
匀减速上升的升降机中，最多可举起重力为800N的重物，则此人若站在地面上，最多可举起质量为（ ）的重物.(g=10