对每一个质量特性或问题逐层深入排查可能原因，然后确定最主要原因的方法称为（）。A．直
题型：单项选择题
问题：
对每一个质量特性或问题逐层深入排查可能原因，然后确定最主要原因的方法称为（）。
A．直方图法
B．分层法
C．排列图法
D．因果分析图法
题型：单项选择题
同学们，看到下面的四幅图片及相应的报道后，你感到最担忧的是哪两种情形？请简述你担忧的理由并提出建议或希望。
要求：⒈ 从所给素材中任选两种情形进行阐述，不可多选或少选。
⒉ 条理清楚，意思连贯，语句通顺，标点正确；
⒊ 词数120左右。
THE POLLUTIONS
① One third of the world's people don't have enough clean water.
② More and more diseases are caused by polluted air.
③ People are disturbed quite often by kinds of noises.
④ Every person in our city makes about 1.8 kilos of rubbish every day.
With the development of industry, the environment is becoming worse and worse. There are many kinds of pollution I worry about.
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