某污水的污染物类型数=4，且需预测浓度的水质参数数目=7，这类污水水质的复杂程度属（）。
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When one upbound vessel is overtaking another vessel and both are pushing a tow ahead，what reaction may you expect（）.
A. Both towheads will tend to drift apart，and the overtaking vessel will be slowed down
Both towheads will tend to drift together，and the overtaking vessel will be slowed down
C. Both towheads will tend to drift apart，and the overtaken vessel will be slowed down
D. Both towheads will tend to drift together，and the overtaken vessel will be slowed dow
男子穿西装时要注意“三一定律”，即鞋子、腰带、袜子应控制在一种颜色，以黑色为首选。
A. 正确
B. 错误
苏轼论词强调协律，崇尚典雅、情致，提出”词，别是一家“之说，反对以作诗文之法作词。
A. 正确
B. 错误
在学习观测作业的实施步骤后，你认为作为观测作业组的组长应该如何有效的组织测站工作？
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