饭店内外专修装饰中高档材料从环保性看应（）。
A.光泽度高
B.耐洁污性
C.无放射性
D.抗冻性强
参考答案：C
On her birthday, she received from her parents a nice present _____ a note was attached, _____ “We love you so much”.
A．that, saying
B．to which, saying
C．to which, said
D．in which, said
在SQL语言的SELECT语句中，实现投影操作的是哪个子句 ( )
A．SELECT
B．FROM
C．WEHERE
D．GROUPBY
