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【单选题】
下列说法中，正确的是( )A.
氢键只存在于同一种分子之间
B.
金属阳离子只能与阴离子构成晶体
C.
粒子间以分子间作用力结合的晶体，其熔点不会很高
D.
氮化硅是一种新型的耐高温耐磨材料，它属于分子晶体
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【单选题】Flower sedan is also known as the “______”.
A.
wedding sedan
B.
plain sedan
C.
funeral sedan
D.
blue sedan
【单选题】"Universal sedan chair" costs more than ______ man-hours to make.
A.
4000
B.
6000
C.
8000
D.
10000
【单选题】Human and the Environment One of the most pressing challenges that the United States and indeed the world will face in the next few decades is how to alleviate (减轻点)the growing stress that human activ...
A.
It has been estimated that the world's water use could triple in the next two decades.
B.
Plant and animal species are becoming extinct at a greater rate now than at any time in earth's history.
C.
The overuse of antibiotics (抗生素) both in humans and in farm animals has contributed to the growth of antibiotic resistant micro-organisms (微生物).
D.
Yet, there is reason to have hope for the future.
E.
Until recently, very little information was documented about changes and consequences of land usage.
F.
Such changes cause changes in local and regional climate, and will determine the future of agriculture. (46)
【单选题】Human and the Enviromnent One of the most pressing challenges that the United States and indeed, the world will face in the next few decades is how to alleviate(减轻)the growing stress that human activi...
A.
It has been estimated that the world's water use could triple in the next two decades.
B.
Plant and animal species are becoming extinct at a greater rate now than at any time in Earth's history.
C.
The overuse of antibiotics(抗生素)both in humans and in farm animals has contributed to the growth of antibiotic-resistant micro-organisms(微生物).
D.
Yet, there is reason to have hope for the future.
E.
Until recently, very little information was documented about changes and consequences of land usage.
F.
Such changes cause changes in local and regional climate, and will determine the future of agriculture. 第 46 题 请选择（1）处的最佳答案．
【简答题】sedan
【简答题】Bosses think their firms are caring. Their minions disagree. As Walmart grew into one of the world's largest retailers, its staff were subjected to a long list of dos and don'ts covering every aspect ...
【多选题】《生产过程危险和有害因素分类与代码》(GB／T 13861—2009)将生产过程中的危险和有害因素分为( )。
A.
人的因素
B.
物的因素
C.
生产因素
D.
管理因素
E.
环境因素
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