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【单选题】
有关通信的概念与发展过程中,下列说法不正确的是A.
最早的通信对点的通信，也就是每一对用户之间建立一条线路
B.
1980年，日本电报电话公司提出综合业务数字I网（ISDN）的结构
C.
光纤通信方式具有大容量的前景，而且可解决铜资源不足的困难，也进一步促进了通信的数字化
D.
微波是指波长在1～100μm 之间的电磁波，这类电磁波的频率很高，可用来传送大量信息，可以从电离层反射
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【简答题】Is it a busy time of year for Rachel and david?
【单选题】药品出库除了遵循近期先出外，还应遵循的原则有
A.
先产先出、 易变先出、 按批号发货
B.
规格数量、 易变先出、 按货号发货
C.
先产先出、 易变先出、 按货号发货
D.
规格数量、 易变先出、 按批号发货
E.
规格数量、 先进先出、 易变先出
【简答题】David Copperfield is my first love. People fall in love seeing the beauty, grace and perhaps the qualification of a person. I, however, fell in love with young David, after reading his life-long strug...
【简答题】阳热之体慎用温热药是一种什么治法?() A热者寒之 B缓则治其本 C先祛邪后扶下 D因人制宜
【简答题】(Fill in the blanks with J for Jennifer and D for David.)
【简答题】My name is Mike and I have a brother and a sister,David and Helen. 1 breakfast we 2 like hamburgers.Helen and I like milk, 3 David doesn’t.I don’t like eggs for breakfast,but David and Helen do.I like...
【单选题】For David, the marginal utility from an additional car is 2,000 units and the marginal utility from an additional vacation is 1,000 units. David is allocating all his budget. Hence to maximize his uti...
A.
shift his consumption from the vacation to the car.
B.
shift his consumption from the car to the vacation.
C.
save his budget by not spending it until he can afford both the car and the vacation.
D.
buy both the car and the vacation now.
E.
possibly do something, but there is not enough information available to determine what he would do.
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