问题
多项选择题
用苏打作介质调整剂的情况有()。
A、黄药浮选PbS时
B、脂肪酸浮选非硫化矿时
C、使用酚类起泡剂时
答案
参考答案:A, B
用苏打作介质调整剂的情况有()。
A、黄药浮选PbS时
B、脂肪酸浮选非硫化矿时
C、使用酚类起泡剂时
参考答案:A, B
Passage 2
According to text, which of the following is not a motive behind the creation of the show a. The profit potential of this morning show is promising. b. It poses little threat to other morning news show produced by Fox. c. It assimilates the best elements of other news programme. d. It has large potential audience.