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【单选题】
长期倾销的条件是出口企业具有一定的()能力。
A.
竞争
B.
生产
C.
销售
D.
垄断
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举一反三
【单选题】Which one of these is not newspaper?
A.
The New York Times
B.
The Washington Post
C.
The Sun
D.
The Declaration of Independence
【单选题】Which one of these is not newspaper?
A.
The New York Times 《纽约时报》
B.
The Washington Post 《华盛顿邮报》
C.
The Sun 《太阳报》
D.
The Declaration of Independence 《独立宣言》
【单选题】《作战篇》当中一辆革车配有士兵多少人
A.
25
B.
75
C.
100
D.
10万
【多选题】Which one of these are Scottish inventions?
A.
universal standard time
B.
RADAR
C.
ATM
D.
PIN
E.
the theory of electromagnetism
F.
Higgsboson
G.
Penicillin
【单选题】Which one of these statements is correct?
A.
Individuals tend to prefer later cash flows over current cash flows.
B.
The value of an investment depends on the size, timing, and risk of the investment's cash flows.
C.
When selecting one of two projects, managers should select the project with the higher total expected cash flow.
D.
Most investors prefer greater risk over less risk.
【单选题】which one of these sentences is ture
A.
the writer doesn't like garden
B.
the writer likes gardens, but he is lazy
C.
the writer never enters for the competition
D.
the writer never wins a prize
【简答题】已知双曲线 中心在原点,焦点坐标是 ,并且双曲线的离心率为 。 (1)求双曲线 的方程; (2)椭圆 以双曲线 的焦点为顶点,顶点为焦点,求椭圆 的方程。
【单选题】求双曲线 的顶点坐标
A.
(-16,0) ,(16,0)
B.
(-4,0),(4,0)
C.
(-9,0),(9,0)
D.
(-3,0),(3,0)
【简答题】设双曲线的顶点为(0,±1),该双曲线又与直线 15 x-3y+6=0 交于A,B两点,且OA⊥OB(O为坐标原点). (1)求此双曲线的方程; (2)求|AB|
【简答题】设双曲线的顶点为 ,该双曲线又与直线 交于 两点,且 ( 为坐标原点)。 (1)求此双曲线的方程; (2)求
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