工作许可人()签发工作票。
参考答案:不可以
“Drive-ins” have large parking lots ______ customers are served in their cars by waitresses.
A.who
B.when
C.which
D.where
SLE肾损害的发生机制是()
A.Ⅰ型变态反应
B.Ⅱ型变态反应
C.Ⅲ型变态反应
D.Ⅳ型变态反应