用活塞式压力计检测井口压力，置于压力计托盘上的砝码示值必须（）井口压力。
A、小于
B、大于
C、等于
D、小于或等于
参考答案：B
The scientists approached the pandas quietly and watched them. The underlined part means ____. [ ]
A. left behind
B. ran quickly to
C. went off
D. came near to
Anna doesn’t have _________ bedroom. She lives _______ her parents
A．her own ; in
B．own her ; with
C．her own ; with
D．her own ; at
