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【多选题】
有时需要用extern来声明外部变量,请选择需要用extern声明的情况A.
当某个外部变量在定义前被使用时,需要用extern声明。
B.
当一个C多个源程序文件组成时,如果两个文件要用到同一个变量,可以在两个文件中都用extera进行定义
C.
当一个C多个源程序文件组成时,如果两个文件要用到同一个变量,不可以在两个文件中都进行定义,可在一个文件中定义该变量,在另一个文件中不再定义,只是在使用extern加以声明
D.
以上说法
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【单选题】关于绩效考核指标评价标准的注意事项，下列说法错误的是（）
A.
指标评价标准的压力要适度
B.
指标评价标准要有一定的稳定性
C.
对指标评价标准的修订需要做大幅度的变动
D.
需要对指标评价标准进行不断的修订
【单选题】The young writer’s first book ______next month is based on a real person and event.
A.
published
B.
publishing
C.
to be published
D.
to publish
【单选题】At first few month after birth and when a person is young ,what happens to a person's eyes according to the text?
A.
He is long-sighted; his two eye are not cooperated and he sees clearly in dim light.
B.
His mother always worries that he will ruin his eyes because he likes to read in dim light.
C.
His eyes can see clearly in bright light and the two eye can move in exact unison.
D.
The vision of his eyes reaches the best point when a person is at the age of six.
【单选题】What may be one of the most exciting things of a young person's life?
A.
Traveling in a car.
B.
Learning to drive and obtaining a driver's license.
C.
Becoming fourteen years old.
D.
Working after school during their last year of high school.
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