亚甲基蓝分光光度法测定水中硫化物显色时，加入的显色剂均含硫酸，应沿管壁徐加入，并加塞混匀，避免硫化氢逸出而损失。
参考答案：对
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________ has interest in our outdoor adventure club can apply for its membership.
A．No matter who
B．No matter anyone
C．Anyone
D．Whoever
Yangzhou bear is _____ and is sold all over the world. [ ]
A. of high quality
B. high quality
C. good quality
D. of poor quality
