紫外线杀菌的最佳波长是()
A.254nm
B.245nm
C.250nm
D.452nm
E.425nm
参考答案:A
The result is not the same __ they had expected, ______ was rather disappointing.
A.as; that
B.which; as
C.as; which
D.that; which
做蛋糕采用的是( )膨松法发酵面坯。
A.化学
B.物理
C.纯酵母
D.面肥发酵