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Diets have changed in China — and so too has its top crop. Since 2011,the country ___61___ (grow)more corn than rice. Corn production has jumped nearly 125 percent over___62___ past 25 years, while rice has increased only 7 percent. A taste for meat is ___63 ___ (actual) behind the change: An important part of its corn is used to feed chickens, pigs, and cattle. Another reason for corn&39;s rise: The government encourages farmers to grow corn instead of rice ___64 ___(improve) water quality. Corn uses less water ___65___rice and creates less fertilizer(化肥) runoff. This switch has decreased___66___(pollute) in the country&39;s major lakes and reservoirs and made drinking water safer for people. According to the World Bank, China accounts for about 30 percent of total ___67___(globe)fertilizer consumption. The Chinese Ministry of Agriculture finds that between 2005—when the government ___68___(start) a soil-testing program ___69___gives specific fertilizer recommendations to farmers - and 2011, fertilizer use dropped by 7.7 million tons. That prevented the emission(排放) of 51.8 million tons of carbon dioxide. China&39;s approach to protecting its environment while ___70___(feed) its citizens "offers useful lessons for agriculture and food policymakers worldwide." says the bank&39;s Juergen Voegele. 61_________ 62 63 64 65 66 67 68 69 70
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【判断题】货物作业车分为一次货物作业车、两次货物作业车和多次货物作业车。
A.
正确
B.
错误
【判断题】空间电荷区的正离子和负离子可以复合
A.
正确
B.
错误
【简答题】按其在本站进行装卸作业次数不同,货物作业车可分为_____和_____。
【单选题】技术站推算班计划一次货物作业平均停留时间时,本站班双重货物作业车18辆,一次货物作业车4辆,倒装车(一车倒二车)一辆,本站装卸作业次数为()。
A.
43次
B.
42次
C.
41次
D.
23次
【单选题】本工程外窗的气密性等级为( )级。 (2.5)
A.
2
B.
5
C.
3
D.
6
【单选题】本工程外窗的气密性等级为( )级
A.
2
B.
5
C.
3
D.
6
【多选题】按货物列车在本站有无调车作业,分为 ( ) 两种。
A.
一次作业车
B.
无调中转车
C.
有调中转车
D.
双重作业车
【多选题】货物作业车按其在站作业过程不同分为( )和( )。
A.
一次货物作业车
B.
两次货物作业车
C.
多次货物作业车
D.
双重货物作业车
【多选题】货物作业车按其在本站完成装卸作业的次数不同又可分为 和 两种。
A.
一次货物作业车
B.
双重货物作业车
【多选题】关于本工程门窗说法正确的是( )。
A.
建筑外窗气密性等级为4。
B.
总共有7种窗台高度。
C.
窗台压顶高度均为100mm
D.
窗台下部滴水线宽度为20mm
E.
外窗台向外找坡0.5%
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