问题
选择题
—What are they doing now?
—They are ____ bags of rice. [ ]
A. taking
B. carrying
C. bringing
D. getting
答案
答案：B
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—What are they doing now?
—They are ____ bags of rice. [ ]
A. taking
B. carrying
C. bringing
D. getting
答案：B
现每次抽检5件共抽检了25批。决定用-s控制图进行分析。查表得子组n＝5时A1＝1.342 A2＝0.577 A3＝1.427 B3＝0 B4＝2.089。
图如下，该图是一个().