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问题 单项选择题

CCE（Control Channel Element）可用于数据量相对较大的PDCCH的资源分配，每个用户的PDCCH只能占用（）个CCE，称为聚合级别。

A.1，2，4，8

B.1，2，8，16

C.16，24，48，96

D.16，32，48，96

答案

参考答案：A

选择题

如图所示,实线和虚线分别为某种波在t时刻和t+Δt时刻的波形曲线.B和C是横坐标分别为d和3d的两个质点.下列说法中正确的是 (    )

A．任一时刻,如果质点B向上运动,则质点C一定向下运动

B．任一时刻,如果质点B的速度为零,则质点C的速度也为零

C．如果波是向右传播的,则波的周期可能为Δt

D．如果波是向左传播的,则波的周期可能为Δt
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单项选择题

Want a glance of the future of health care Take a look at the way the various networks of people about patient care are being connected to one another, and how this new connectivity is being exploited to deliver medicine to the patient—no matter where he or she may be.
Online doctors offering advice based on normal symptoms are the most obvious example. Increasingly, however, remote diagnosis will be based on real physiological data from the actual patient. A group from the University of Kentucky has shown that by using personal data assistance plus a mobile phone, it is perfectly practical to send a patient’s important signs over the telephone. With this kind of equipment, the cry asking whether there was a doctor in the house could well be a thing of the past.
Other medical technology groups are working on applying telemedicine to rural (countryside) care. And at least one team wants to use telemedicine as a tool for disaster need—especially after earthquakes. On the whole, the trend is towards providing global access to medical data and experts’ opinions.
But there is one problem. Bandwidth is the limiting factor for sending complex medical pictures around the world—CT photos being one of the biggest bandwidth users. Communication satellites may be able to deal with the short-term needs during disasters such as earthquakes or wars. But medicine is looking towards both the second-generation Internet and third-generation mobile phones for the future of remote medical service.
Doctors have met to discuss computer-based tools for medical diagnosis, training and telemedicine. With the falling price of broadband communications, the new technologies should start a new time when telemedicine and the sharing of medical information, experts’ opinions and diagnosis are common.

Which of the following statements is true according to the text

A. Patients don’t need doctors in hospitals any more.
B. It is impossible to send a patient’s signs over the telephone.
C. Many teams use telemedicine dealing with disasters now.
D. Broadband communications will become cheaper in the future.
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