下列说法不正确的是（）。 A.COD测定通常采用K2Cr2O7和KMnO7为氧化剂
题型：单项选择题
问题：
下列说法不正确的是（）。
A.COD测定通常采用K2Cr2O7和KMnO7为氧化剂
B.COD测定不仅氧化有机物，还氧化无机性还原物质
C.COD测定包括了碳化和硝化所需的氧量
D.COD测定可用于存在有毒物质的水
题型：单项选择题
根据句子意义及所给的首字母完成单词．
1. The little boy was made to c_______ wood in the early morning.
2. The plants need to be w ______ every two days, or they'll die.
3. He has already visited the p
lace where his a _____ lived.
4. Kobert has come to visit his h _____ (故乡)
5. Have you w ______ the plants?
6. Have you p ______ the beach towels yet?
7. I haven't c ______ out the refrigerator yet.
8. One of the best b _____ on the music scene is the New Ocean Waves.
9. The program is o _______ by the local government of Guangdong Province.
10. The famous band is going to a ______ on CCTV next week.