题干
Is there a girl __________ Wang Jia in your class?
A：call
B：called
C：calling
D：to call
答案(点此获取答案解析）
B
Is there a girl __________ Wang Jia in your class?
A：call
B：called
C：calling
D：to call
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