The house was ____ by high walls. (surroundings)

The ____ was beginning to fall from the walls.

There are two walls in eduation. One is visible walls of the builiding seperating the school from real lives; the other is invisible walls between disciplines.

Plant grows in the soil and is an autotrophic organism with cell walls.

It has 2 walls: the inner and the outer. ______ these walls, there is a vacuum to keep the liquid at a constant temperature.

These walls ___ stone.

Many beautiful paintings were_________ on the walls. A: hung B: hanged

文献:Clay-chitosan nanobrick walls

The patient believes that people can see throught walls. He's suffering from a ______.

Which of the following is a steel structure building? (There is only one correct answer to this question) A: The building, beams and columns are reinforced concrete, the roof and walls are profiled steel plate B: The building, beams and columns are hot rolled steel, walls are masonry block C: The building, beams and columns are timber, walls are masonry block D: The building, beams and columns are bamboo, walls are masonry block