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【单选题】
The economist whose writings in the 1930's concluded that the cause of an economic depression is inadequate spending was:A.
Herbert Hoover
B.
John Maynard Keynes
C.
Andrew Mellon
D.
Joseph Schumpeter
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举一反三
【单选题】The number of MPs in the current House of Common of UK Parliament is ____.
A.
646
B.
650
C.
659
D.
720
【单选题】晚间实行交通管制:每日( ),除公务车、教职员工车辆、已审批获准的学生机动车和经营单位自备车外,禁止机动车(含电动三轮车)入校。
A.
18:30-00:00
B.
17:00-23:00
C.
19:00-00:00
【单选题】The number of MPs in the current Lower House of UK Parliament is ______.
A.
646
B.
650
C.
659
D.
720
【单选题】The number of MPs in the current lower house of UK Parliament is .
A.
646
B.
650
C.
659
D.
720
【简答题】若r=√x^2＋y^2＋z^2,计算▽r,▽r^2,▽1／r▽f(r),▽r^n(n≥3)高等数学复旦大学出版第三版下册课后习题答案习题十三 若r=√x^2+y^2+z^2,计算▽r,▽r^2,▽1/r▽f(r),▽r^n(n≥3)
【简答题】若A，B为n阶矩阵，则r(AB)≤min(r(A)，r(B))．
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