【单选题】Which of the following statements is true?
A.
Grown - ups like new stamps while young boys like used ones.
B.
There are hundreds of kinds of stamps in the world.
C.
Sometimes stamp collectors are willing to pay thousands of yuan or more for a used stamp.
D.
A post - office worker does not want to buy any used stamps.
【简答题】1)Now, 3G cell phones are becoming more and more _______ in China.2)One year after the financial storm, the market situation began to ____________________.3)Xiao Hua used to _____________ col...
【简答题】在题图所示的放大电路中,已知三极管 , , ,电容 、 、 可视为交流电路, : 1计算电压增益 、 = ,输入电阻 ,输出电阻 、 ; 2说明此放大电路的功能。
【单选题】对于ISBN号描述错误的是
C.
在当代社会出版的书必须有ISBN号,否则是非正规出版物。
D.
相对于ISBN号,ISSN号是标准国际连续出版物号的简称,指期刊,杂志,报纸类的连续出版物。
【单选题】经常听到一些企业说“质量就是生命”,其根本含义是()
C.
客户对质量的需求是没有止境的,这对企业来说是一件要命的事