“”符号中上表示需控制表面加工纹理平行于标注代号的视图的投影面。
参考答案：错
Not until the teacher came in ______ what I had said.[ ]
A. they did believe
B. they believed
C. didn't they believe
D. did they believe
沉积岩粒级的划分，砾石颗粒应在多少mm以上？（）
A.1mm以上
B.2mm以上
C.5mm以上
