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某一级公路,全长75km,设计车速80km/h,路线通过地区气候干燥,路面底基层为填隙碎石,基层为水泥稳定碎石,面层为沥青混凝土。
填隙碎石的施工工艺包括:①运输和摊铺粗碎石;②撒布填隙料;③初压;④再次撒布填隙料;⑤振动压实。施工完后,拟检测如下项目:压实度、弯沉值、平整度、构造深度等。
底基层施工工艺流程正确的是( )。
D.①→②→③→⑤→④→⑤

A.①→②→③→④→⑤
B.①→③→②→⑤→④→⑤
C.①→③→②→④→⑤

【参考答案】

C
解析:正确的填隙碎石施工工艺流程如下图所示:
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Eating Potatoes Gives Your Immune System a BoostEating potatoes is not only good for bowel health, but also for the whole immune system, especially when they come in the form. of a potato salad or eaten colD.In a study on an animal model, researchers in Spain found that pigs fed large quantities of raw potato starch (RPS) not only had a healthier bowel, but also decreased levels of white blood cells, such as leucocytes and lymphocytes in their blooD.White blood cells are produced as a result of inflammation or disease, generally when the body is challengeD.The general down-regulation of leucocytes observed by the Spanish researchers suggests an overall beneficial effect, a generally more healthy body. The reduction in leucocytes levels was about 15 percent. Lower lymphocyte levels are also indicative of reduced levels of inflammation, but the observed reduction in both lymphocyte density and lymphocyte apoptosis is surprising.In what was the longest study of its kind, pigs were fed RPS over 14 weeks to find out the effect of starch on bowel health. 'The use of raw potato starch in this experiment is designed to simulate the effects of a diet high in resistant starch. ' said study leader Jose Francisco Perez at the University Autonoma de Barcelona, Spain.Humans do not eat raw potatoes, but they do eat a lot of foods that contain resistant starch, such as cold boiled potatoes, legumes, grains, green bananas, pasta and cereals. About 10 percent of the starch eaten by human is resistant starch--starch that is not digested in the small intestine and so is shunted into the large intestine where it ferments. Starch consumption is thought to reduce the risk of large bowel cancer and may also have an effect on irritable bowel syndrome (IBS).Immunology expert Lena Ohman's team previously found that the overall lymphocyte levels do not vary for IBS patients, but that lymphocytes are transferred from the peripheral blood to the gut, which support the hypothesis of IBS being at least partially an inflammatory disorder. She says the decrease in lymphocytes observed by the Spanish is therefore interesting, and a diet of resistant starch may be worth trying in IBS patients. Ohman is currently at the Department of Internal Medicine, Goteborg University, Sweden. The study is published in the journal Chemistry and Industry, The magazine of the SCI.What form. of potato is the most nutrient to the human body?A.Potato soup.B.Potato cakE.C.Potato salaD.D.Hot boiled potato.
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F.Potato
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