The ______ cycle of life and death is a subject of interest to scientists and philosophers a- like.
A. incomplete
B. exceeding
C. instructive
D. eternal
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红外线加热，即把能量转化为波长( )μm的红外线辐射到焊件上。
A. 2～10
B. 2～15
C. 2～20
D. 2～25
Careful surveys have indicated that as many as 50 percent of patient do not take drugs ______ directed.
A. what
B. so
C. which
D. as
以下关于标准模块的说法不正确的是
A. 标准模块一般用于存放其他Access数据库对象使用的公共过程
B. 在Access系统中可以通过创建新的模块对象而进人其代码设计环境
C. 标准模块所有的变量或函数都具有全局特性，是公共的
D. 标准模块的生命周期是伴随着应用程序的运行而开始、关闭而结束的
Although customers keep complaining about their Poor service, they've made no ______. to make any improvement.
A. action
B. trial
C. attempt
D. progress
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