James plays _____ Miami Heat. He is going to play _______ the players in the Houston Rockets.
A:for; against
B:for; for
C:against; against
D:against; for
已知y=f(x)是定义在R上的奇函数,且x<0时,f(x)=1+2x
(1)求函数f(x)的解析式;
(2)画出函数f(x)的图象;
(3)写出函数f(x)单调区间及值域.
叶绿体和线粒体是所有植物细胞中能量转换器.(判断对错)
当显微镜的目镜为10X、物镜为10X时,在视野范围内看到一行相连的8个细胞。若目镜不变,物镜换成40X时,则在视野中可看到这行细胞中的 ( )