重型机械或大型船用柴油机的装配属于按分散原则进行的固定式转配。
参考答案:错
解方程:
(1)(x+2)2-25=0
(2)x2-8x-16=0
There's____ wrong with the camera. Look! It works well. [ ]
A. something
B. nothing
C. everything