下列有关汉代长安市的说法,正确的是
①与居住区隔开 ②有专门官员管理 ③又叫草市 ④开市闭市有严格时间规定 [ ]
A.①②③
B.①③④
C.①②④
D.②③④
答案:C
—I’ve got the invitation to your school,Mr Johnson.
—Oh,good.________.
A.How do you like it?
B.Have you read it?
C.Can you come?
D.May I help you?
从Windows环境进入MS-DOS方式后,返回Windows环境的DOS命令为【 】。