四川的最高峰是( )
A.峨眉山
B.四姑娘山
C.贡嘎山
D.龙门山
答案:A
That tests can actually give measurement of the language skills of the students_______ by many teachers.
A.questioned
B.are questioned
C.is questioned
D.questioning
已经确定的稳定而均一的物质,它的数值已由决定性方法确定,所含杂质也已经定量,该物质为()
A.一级标准品
B.二级标准品
C.校准品
D.样品
E.质控品