【简答题】设f(x)的定义域为[0,1],求f(x+a)+f(x-a)(a>0)的定义域
【单选题】According to the passage, ______ .
A.
investing in the housing market will certainly be profitable
B.
the housing market once crashed in the late 1980s
C.
no market is as certain as the housing market
D.
many people would buy a car earlier than buying a house
【简答题】三基色的选择不是唯一的,彩色电视中选择的三基色是 () 、 () 、 () 三色。
【简答题】设函数f(x)的定义域为[0,1],则函数f(x-1)的定义域为______.
【判断题】鲁迅小说无论是农民题材还是知识分子题材,其表现视角都是“外向性”的。()
【简答题】carefully research 认真研究
【简答题】第四代计算机采用的电子器件是______。