A:f(n)≥ log2n+22 (n∈N*)
B:f(2n)≥ n+22 (n∈N*)
C:f(2n)≥ log2n+22 (n∈N*)
D:f(2n)≥ n+22 (n∈N*)
当显微镜视野很暗,影响观察时,应调节光亮程度,此时应采取的措施是( )
interesting subject it is!
The students carried their books away from the school ____ ____ .