《治安管理处罚法》以()的形式公布。
A.国家 * * 令
B.全国人大决议
C.国务院 * * 令
D.公安部长令
参考答案:A
The lady was so absorbed in her job that she didn't hear a customer ________ at the door.
A.to knock
B.knocking
C.be knocked
D.knocked
下图中,S是光源,A是不透明的物体,L是竖直墙面,试画出光源S照不到墙面的范围.