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【简答题】
已知椭圆C：M： x 2 a 2 + y 2 b 2 =1（a＞b＞0）的离心率e= 3 5 ，且椭圆上一点与椭圆的两个焦点构成的三角形16 （Ⅰ）求椭圆M的方程； （Ⅱ）若O（0，0）、P（2，2），试探究在椭圆C内部是否存在整点Q（平面内横、纵坐标均为整数的点称为整点），使得△OPQ的面积S △OPQ =4？若存在，请指出共有几个这样的点？并说明理由（不必具体求出这些点的坐标）．
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【单选题】Packet-switching wireless networks are preferable(66)when transmissions are(67)because of the way charges are(68)per packet. Circuit-switched networks are preferable for transferring large files or fo...
A.
to
B.
for
C.
than
D.
only
【单选题】Packet-switching wireless networks are preferable(71)when transmissions are(72)because of the way charges are(73)per packet. Circuit-switched networks are preferable for transferring large files or fo...
A.
to
B.
for
C.
than
D.
only
【多选题】按照收付实现制原则的要求,下列收入或费用应计入本月的有
A.
本期提供劳务已收款
B.
本期提供劳务未收款
C.
本期欠付的费用
D.
本期预付后期的费用
E.
本期支付上期的费用
【简答题】增大叉车车轮直径可以使最小( )增加,是的叉车的( )提高,( )增加。
【单选题】Kodak is switching its manufacturing from traditional film products to digital equipment.
A.
Right
B.
Wrong
C.
Doesn't Say
【多选题】按照收付实现制原则的要求,下列收入或费用应计入本期的有
A.
本期提供劳务已收款
B.
本期提供劳务未收款
C.
本期欠付的费用
D.
本期预付后期的费用
E.
本期支付上期的费用
【单选题】According to the new study，switching from coal to natural gas__________．
A.
would not cut the warming effect
B.
would not help at all stop temperatures from rising
C.
would cut the warming effect only a little bit
D.
is something that is totally wrong
【单选题】Tired of switching from one company to another, he finally found a____ job in the government.
A.
thorough
B.
significant
C.
frequent
D.
permanent
【单选题】ATM when referring to computers is a dedicated, connection switching technology that organizes digital data into 53-byte(69)units and transmits them over a physical(70)using digital signal technology....
A.
minuteness
B.
toothful
C.
cell
D.
spot
【单选题】Which of the following refers to the cost of switching from one product to a competing product?
A.
Operational cost
B.
Switching cost
C.
Inventory cost
D.
Competitive advantage
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