2x-1.2×5=8，既是等式又是方程．______．
2x-1.2×5=8，是既含有未知数又是等式，具备了方程的条件，因此既是等式又是方程；
故答案为：√．
When I opened the door, I found my father ______ in his chair, completely ______ in a magazine.
A．seated; absorbed
B．seating; gathered
C．sat; losing
D．sitting; concentrated
With these words, they all ___ to look for the lost child.
A．set off
B．set up
C．set free
D．set forth
