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【简答题】
The relationship between sentences may be signaled with a sentence connector. Where it is not, the relationship is implicit and you need to work out the connection. What is the relationship between the second and the first sentence? Is it an explanation, contrast, or example? Wetlands can be an important source of protein. The production of fish in shallow ponds or rice paddies developed several thousands of years ago in China and Southeast Asia, and crayfish harvesting is still practiced in the wetlands of Louisiana and the Philippines.
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举一反三
【单选题】Increasing numbers of parents in the U.S. are choosing to teach their kids at home. In fact, the U. S. Department of Education estimated that, in 1999, around 850,000 children were being homeschooled....
A.
Teacher shortages and lack of funding.
B.
Escalating classroom violence.
C.
Large class and problems inside the classroom.
D.
Dissatisfaction with the educational system.
【单选题】以下是关于决策支持系统的特点描述，以下描述中，哪个(些)属于决策支持系统的特点? Ⅰ．面向高层管理人员经常面临的半结构化或非结构化问题 Ⅱ．DSS一般具有较高的分析数据的能力 Ⅲ．易于使用，交互性强 Ⅳ．强调对环境及用户决策方法改变的灵活性及适应性 Ⅴ．DSS可以代替高层决策者制定决策
A.
Ⅰ、Ⅱ、Ⅲ和Ⅳ
B.
Ⅰ、Ⅲ、Ⅳ和Ⅴ
C.
Ⅱ、Ⅲ、Ⅳ和Ⅴ
D.
都是
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