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【判断题】
当 时, 为一阶非线性微分方程, 求该方程的通解应该用常数变, 或直接通解公式 .A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】According to the United Nations, it estimates that every year's world population growth is ______ .
A.
more than 90 million persons
B.
0. 002 percent per year
C.
5.3 billion
D.
500 million
【简答题】The utility of the United Nations to the United States as an instrument of foreign policy can too easily be underestimated. Over the years since its founding in 1945, the United Nations has been more ...
【单选题】The confirmation of John Bolton as U.S. ambassador to the United Nations requires ______ in the Senate.
A.
a simple majority vote
B.
an overwhelming majority vote
C.
at least 60 votes
D.
100 votes
【单选题】Incoterms were written______.
A.
under the United Nations Convention for the International Sale of Goods (Vienna Convention)
B.
by the International Chamber of Commerce
C.
under the Kyoto Protocols as adopted in 2000
D.
under 'fast track' authority granted by the U.S. Congress
【单选题】The United States falls within which category of the world’s nations?
A.
low-income nations
B.
middle-income nations
C.
high-income nations
D.
socially marginalized nations
【单选题】听力原文： United Nations and international agencies are praising Serbia' s decision to transfer former Yugoslav President Slobodan Milosevic to the Hague. Lisa Schlein in Geneva reports Mr. Milosevic was ...
A.
For crimes of murder.
B.
For crimes against humanity.
C.
For crimes of corruption.
D.
For civil war in Yugoslavia.
【简答题】知识获得的途径主要是通过直观和（ ）。
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