-3-6+9-11+2．
-3-6+9-11+2=0-11+2=-9．
电气化区段作业有哪些规定？
Computers and mobile phones, though they are indeed making our life______and more ______, have reduced the need for face-to-face communications.
A．easily ; efficient
B．easier; efficient
C．easy ; efficiently
D．easily ; efficiently
