单项选择题

‍设, 则（）‏

A．

B．

C．

D．

你可能感兴趣的试题

单项选择题

What type of cell junction prevents passage of macromolecular substance between cells?-Epithelial tissue-3 A.
Desmosome B.
Gap junction C.
Zonula occludentes (tight junction) D.
Zonula adherens (adhering junction)

单项选择题

查询tb001数据表中前5条记录，并升序排列的SQL语言是（）。

A.SELECT*FROMtb001ORDERBYidGROUPBYLIMIT0，5;
B.SELECT*FROMtb001ORDERBYidORDERLIMIT0，5;
C.SELECT*FROMtb001ORDERBYidDESCLIMIT0，5;
D.SELECT*FROMtb001ORDERBYidASCLIMIT0，5;