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问题 单项选择题

下述哪一项描述不正确的（）

A.呼吸肌的收缩、舒张是肺通气的原动力

B.呼气总是被动过程

C.吸气总是主动过程

D.正常人平静呼吸为每分钟16～20次

答案

参考答案：B

选择题

When _________ by the reporter about his generous action, he said: “__________ others can always be joyful.”

A．being interviewed; Helping

B．interviewed; To help

C．having interviewed; Help

D．interviewing; Having helped
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单项选择题

WAP uses (71) , which includes the Handheld Device Markup Language (HDML) developed by Phone.com. WML can also trace its roots to eXtensible Markup Language (XML). A markup language is a way of adding information to your (72) that tells the device receiving the content what to do with it. The best known markup language is Hypertext Markup Language. (73) HTML, WML is considered a meta language. Basically, this means that in addition to providing predefined (74) , WML lets you design your own markup language (75) . WAP also allows the use of standard Internet protocols such as UDP, IP and XML.

（72）处填（）。

A．packet

B．content

C．text

D．applets
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