在下列镜头的组合中,看到细胞数目最多的是( )
A:目镜5×、物镜5×
B:目镜10×、物镜10×
C:目镜5×、物镜10×
D:目镜10×、物镜15×
二次函教y=x2+2x-5有( )
—Because it's exciting.
As Tim loves Shanghai a lot, he bought _______ one-way ticket to Shanghai.