A fire involving aluminum powder would be a class _____.A."A" fireB."B" fireC."C" fireD."D

Some boys took chemicals like soda and iodoform. powder because ______.A．they liked to set

（The metal) aluminum （has been) （first) isolated （early) in the nineteenth century.A．The m

Ring groove inserts are occasionally used on aluminum alloy piston to_______.A.reduce the

I think that our boss took a powder right after the meeting. The underlined part means____

What was the problem with the original mobile？A．It was made of aluminum.B．It wasn"t large

Who are the subjects of the research on the influence of milk powder？A．Mothers who bottle-