—_______
—Not bad.
A:How old are they?
B:Judy doesn’t like thrillers at all.
C:Where do you have breakfast?
D:What do you think of the salad?
倡导节约资源、减少能源消费的低碳生活,下列不可取的是( )
如图为大豆生长发育过程的示意图,下列叙述正确的是( )
已知函数f(x)=|x﹣1|+|x+1|.
(1)求不等式f(x)≥3的解集;
(2)若关于x的不等式f(x)>a2﹣x2+2x在R上恒成立,求实数a的取值范围.
在制作口腔上皮细胞临时装片时,不用清水而用生理盐水,主要是为了( )