煤按挥发分含量可分为:()、烟煤、贫煤和褐煤。
A、无烟煤
B、块煤
C、末煤
D、精煤
参考答案:A
---- Wow! You look slimmer than before! How did you lose weight?
---- I did not ____ do some exercise and even eat more meat before, but now I have got ____ doing more exercise and eat less meat.
A.use to; used to
B.used to; use to
C.used to; used to
D.use to; use to
土钉墙的钢筋网搭接宜采用(),土钉外端与钢垫板或加强钢筋应采用()进行连接。
A.焊接,螺丝端杆锚具
B.焊接,螺丝端杆锚具或焊接
C.螺丝端杆锚具或焊接,焊接