问题 问答题

(三)
某高速公路全长50km,路面面层为三层式沥青混凝土结构。施工企业为公路交通大型企业专业施工队伍,设施精良。为保证工程施工质量,防止沥青路面施工中沥青混合料摊铺时发生离析、沥青混凝土路面压实度达不到要求和平整度及接缝达不到要求,施工单位在施工准备、沥青混合料的拌和、运输、摊铺、压实、接缝的处理等方面,做了如下工作。
1.选用经试验合格的石料进行备料,严格对下承层进行清扫,并在开工前进行试验段铺筑。
2.沥青混合料的拌和站设置试验层,对沥青混合料及原材料及时进行检验,拌和中严格控制骨料加热温度和混合料的出厂温度。
3.根据拌和站的产量、运距合理安排运输车辆,确保运输过程中混合料的质量。
4.设置2台具有自动调节摊铺厚度及找平装置的高精度沥青混凝土摊铺机梯进式施工,严格控制相邻两机的间距,以保证接缝的相关要求。
5.压路机由2台双轮双振压路机及2台16t胶轮压路机组成,严格控制碾压温度及碾压重叠宽度。
6.纵缝采用热接缝,梯进式摊铺,后摊铺部分完成,立即骑缝碾压,以除缝迹,并对接缝作了严格控制。
问题:

请简述横接缝的处理方法。

答案

参考答案:首先用3m直尺检查端部平整度,不符合要求时,垂直于路中线切齐清除。清理干净后在端部涂黏层沥青后继续摊铺。横向接缝的碾压先用双轮双振压路机进行横压,压路机位于已压实的部分伸入新铺层的宽为15cm,然后每压一遍向铺混合料方向移动15~20cm,直至全部移在新铺层上为止,再改为纵向碾压。

完形填空
I would like to talk to you about space vegetables, and to show you that space vegetables are healthy and good for you.
Space vegetables are grown from seeds that have been taken to and brought back from outer space. The seeds are affected by the radiation(辐射) and low gravity in outer space. When they are brought back to Earth, these seeds produce vegetables that are bigger, healthier and more nutritious(有营养的) than normal vegetables. However, some people worry about eating space vegetables. They think that space vegetables might not be good for us and could give us cancer as a result of their exposure(暴露) to radiation in space. People should not be scared, as space vegetables are actually perfectly healthy.
Here are some facts that you should know about space vegetables:
Space vegetables are grown from seeds that are carefully selected. When seeds are brought back from space, they are tested to make sure that the vegetables they grow will be safe to eat. There are no traces(痕迹) of radiation after testing.
Space vegetables are better for you than normal vegetables. For example, space tomatoes stay fresh for twenty days, which is one week longer than normal tomatoes. Another popular space vegetable is the peppers. Space peppers contain 20 percent more vitamin C than normal peppers.
After modified(转基因) foods came onto the market, people worried that they were eating unknown things. For example, if nut genes are put inside potatoes, people allergic(过敏的) to nuts might get very sick from eating these potatoes because they do not know they are also eating nuts. Unlike genetically modified foods, space vegetables have not been genetically changed. This means that no new genes are put into the vegetables. Therefore, they won’t damage your health.
Title: Space Vegetables
Space vegetables are healthy, good and  小题1: for you to eat.
Steps taken to ensure the quality of space vegetables
Before being brought to the outer space, the 小题2: are carefully selected.
When being brought back from space, vegetables are  小题3: to see whether there are traces of radiation which might
小题4: to cancer. The testing has 小题5: that they are perfectly healthy.
小题6: of space vegetables
After being  小题7: by the radiation and low gravity in outer space, the seeds produce bigger and healthier vegetables. For example, Space peppers contain 小题8: vitamin C.
Space tomatoes stay 小题9: longer than normal tomatoes.
Don’t worry. There is no  小题10: of eating something that may damage your health because none of the genes is changed
问答题 简答题