问题
判断题
标称最大粒度是指与筛上物累计质量分数最接近（但不大于）5%的筛子相应的筛孔尺寸。
答案
参考答案：对
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标称最大粒度是指与筛上物累计质量分数最接近（但不大于）5%的筛子相应的筛孔尺寸。
参考答案：对
| Complete the passage with the proper words in the box. Each word can only be used once. One word is not needed.
the city's population of 23 million, but everyone agrees that traffic is a big problem here. And many people would argue that it's not the number of cars on the road, but the _2_ of the drivers that is the main cause of concern. According to one survey, 37% of Shanghai drivers have less than three years of driving experience. Many of these drivers are middle-aged and have never operated machinery more _3_ than a washing machine. On the road, they drive fast when they should drive slow, _4_ use turn signals, and make right turns on red lights without stopping first. And in the past year, there have been several incidents that resulted in pedestrian deaths when _5_ drivers mistook the gas pedal for the brake (刹车)pedal. There are new regulations _6_ at making it more difficult for people to get a driver's license, but that is only a partial solution to Shanghai's traffic problems. What is really needed is a _7_ in drivers' attitudes. There seems to be a lack of concern for safety on the part of drivers: their own safety and the safety of others. You can see this every day as drivers change lanes aggressively and _8_ pedestrians at crosswalks and intersections. A car is a great convenience, but it can also be a _9_ weapon. Drivers will have to realize that before Shanghai's streets can become truly safe. |