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【单选题】
在电子商务条件下，买方应当承担的义务不包括（ ）A.
买方应承担按照网络交易规定方式支付价款的义务
B.
准确、及时地进行电子资金的划拨义务
C.
买方应承担按照合同规定的时间、地点和方式接受标的物的义务
D.
买方应当承担对标的物验收的义务
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【单选题】Research completed in 1982 found that in the United States soil erosion ______.
A.
reduced the productivity of farmland by 20 percent
B.
was almost as severe as in India and China
C.
was causing significant damage to 20 percent of farmland
D.
could be reduced by converting cultivated land to meadow or forest
【简答题】患者，男，56岁，发作性胸痛半年，每当急走或骑自行车上坡时感觉左胸压榨样疼痛，停止活动后，休息几分钟可以缓解，冠状动脉造影显示冠状动脉有狭窄，结合所学知识进行分析：1.该患者的临床诊断是什么？2.主要存在哪些护理问题？3.患者胸痛发作时应该如何处理？
【多选题】Soil erosion includes the three processes of
A.
Dissolution
B.
Detachment
C.
Transport
D.
Deposition
E.
Adsorption
【简答题】土壤侵蚀类型 soil erosion type
【单选题】The sharp decrease of soil erosion in 1982 resulted from
A.
the education of the USDA on farming technology.
B.
the practices of environmental protection on farming.
C.
the prevention of water runoff in the two large areas.
D.
the protection of plant residues around the whole year.
【单选题】______ is causing soil erosion(侵蚀)in the game reserves.
A.
The bad weather
B.
The disappearance of vegetation which is eaten by the animals
C.
The violent storms
D.
The animals
【简答题】危险品有几大类？内容分别是什么？
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