采用搭接时,搭接长度:圆钢双面焊接为直径的()倍、圆钢单面焊接为直径的12倍。
参考答案:6
属于铝热反应的是[ ]
A、Al+HCl
B、Al+ Fe2O3
C、Al+NaOH
D、Al+O2
— These grapes look really beautiful.
— They _______! See the price $3.99 a pound. Very expensive, aren't they!
[ ]
A. would
B. could
C. might
D. should