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问题 单项选择题

我国居民膳食中蛋白质的主要来源是( )

A．粮谷类
B．蔬菜类
C．肉类
D．蛋类
E．豆类及其制品

答案

参考答案：A

解析：[解释点评] 注意“来源”为常考点，提醒大家注意。(2003年考试真题)

单项选择题

Extreme Programming(XP)is a discipline of software development with (71) of simplicity, communication，feedback and courage．Successful software development is a team effort-not just the development team，but the larger team consisting of customer, management and developers．XP is a simple process that brings these people together and helps them to succeed together．XP is aimed primarily at object-oriented projects using teams of a dozen or fewer programmers in one location．The principles of XP apply to any (72) project that needs to deliver quality software rapidly and flexibly． An XP project needs a (73) customer to provide guidance．Customers，programmers, managers，are all working (74) to build the system that’s needed．Customers-those who have software that needs to be developed-will learn simple, effective ways to (75) what they need，to be sure that they are getting what they need，and to steer the project to success.

71（）

A．importance

B．keys

C．roles

D．values
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多项选择题

材料的物理性指标主要有（）。

A.弹性

B.塑料

C.表观密度

D.密实度

E.抗冻性
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