有一除尘器的正方形灰斗，上口内壁边长2m×2m，下底内壁边长0.5m×0.5m，高2

0.659保留一位小数约是（    ）；0.384里面有（    ）个千分之一。

Playing on the football pitch ____________________.

A．some students are with their P.E. teacher

B．their P. E. teacher is with some students

C．some students with their P. E. teacher are

D．are some students with their P. E. teacher

简要回答死亡原因的鉴定。

______ the terrible disease, she can't have a good sleep every night.  [ ]

A. Learning from

B. Suffering from

C. Looking after

D. Changing into

创建地图时，应该添加的重要特性是什么（选择所有正确答案）（）

A.障碍物

B.墙

C.门

D.人