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问题 单项选择题 A1/A2型题

下列哪项疾病属于心身疾病（）

A.抑郁症

B.大叶性肺炎

C.精神发育迟缓

D.消化性溃疡

E.精神分裂症

答案

参考答案：D

解析：心身疾病亦称心理生理疾病。指那些心理-社会因素在疾病的发生和发展中起主导作用的躯体疾病，如气喘、高血压、皮肤过敏、胃溃疡等疾病与心理因素都有很大关系。

选择题

 _______ our classroom _______ a big tree.         [ ]

A. In front of; is        

B. In front of; are         

C. In the front of; are    

D. In the front of; is

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单项选择题

While the Internet is inherently insecure, businesses still need to preserve the privacy of data as it travels over the network. To help do that, the Internet Engineering Task Force an international group of network designers, operators, vendors, and researchers concerned with the evolution of (71) has developed a suite of (72) called Internet Protocol Security (IPSec).
IPSec creates a standard platform to develop secure networks and electronic (73) between two machines. Secure tunneling via IPSec creates (74) connections in a network through which data packets can move. It creates these tunnels between remote users and within a local network. It also (75) each data packet in a new packet that contains the information neccessary to set up, maintain and tear down the tunnel when it’s no longer needed.

A．channels

B．Web browser

C．Internet data

D．Internet architecture
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