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问题 多项选择题

心肺复苏时早期电除颤的原因有（）

A.心脏骤停最常见和最初发生的心律失常是心室颤动

B.电除颤是终止心室颤动最有效的方法

C.随着时间的推移，成功除颤的机会迅速下降

D.电除颤也可使心脏停搏与无脉性电活动患者获益

E.临床和流行病学研究证实，早期电除颤是挽救患者生命最关键的环节

答案

参考答案：A, B, C, E

单项选择题

For each blank, choose the best answer from the four choices and write down on the answer sheet.

(1) is a one-way function that takes an arbitrarily long piece of plaintext and from it computes a fixed-length bit string.

(2) is a protocol that most USENET machines now use it to allow news articles to propagate from one machine to another over a reliable connection.

(3) is an approach preferred by cable TV providers. In this solution the fiber terminates at an optoelectrical converter and the final segment is a shared coaxial cable.

(4) is a device used to connect two separate network that use different communication protocol.

(5) is a digital-to-digital polar encoding method in which the signal level is always either positive or negative.

2（）

A．RTP

B．RTTP

C．FTP

D．NNTP
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单项选择题

当一个广播消息到达接收者时，Android调用BroadcastReceiver的什么方法（）

A.onReceive

B.BroadcastReceiver

C.Broadcast

D.receive
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