某工厂生产的产品，重量值是其质量特性之一，标准要求为1000±0.50(g)，用直方图分析产品的重量分布情况。收集生产稳定状态下的产品100个，测定其重量得到100个数据(或收集已经测定过的数据100个)，根据直方图判定工序中存在缓慢的影响因素，经分析验证证明有工具缓慢磨损的影响，以下哪个直方图是反映此现象的图形()
A.A
B.B
C.C
D.D
参考答案：D
解析：
考察绘制直方图的内容。依据题意:有缓慢影响因素的直方图的特点是图形顶端较平，峰顶不突出。因此，答案是D。
| 完形填空。阅读下列短文，从每小题所给的A、B、C、D四个选项中选出最佳选项。 | ||||
| What is the population of China? There are more than 1.2 billion people in China. It is 1 one fifth of the world's population. How to control the population growth is a big problem. Some people think it 2 to control the population growth. But I don't quite agree 3 them, because where there is a will, there is a way. The question is how we could 4 it known to everyone how serious the population problem is. Our farmland is becoming less and less to everyone. We have already got too many mouths to feed. 5 we control the population growth, many people will die 6 hunger. Too fast population growth have been and will be bad for our nation. Though laws have been passed to control the population growth, in some places 7 is done to carry out (贯彻) the laws. We should make people 8 that it is foolish of them to bring too many children into the world. They shall no longer do what they have been doing for many years. We are fighting 9 too fast population growth. Yet the fighting won't end 10 everyone knows its important and does something for it. | ||||
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