在滴定法测定氨氮时，以（）作为指示剂。
A.淀粉
B.甲基红-亚甲基蓝
C.DETA
D.试亚铁灵
参考答案：B
一个人有缺点并不可怕，关键是能够_____________自己的缺点，将缺点_____________为优点。
_____ when I saw him the second time _____ how handsome he was.[ ]
A. Only; I noticed
B. Not only; that I noticed
C. Only; did I notice
D. Not only; but also I noticed
