（）是在预热、焙烧阶段之前进行的一道中间作业。
参考答案：生球干燥
建筑施工总平面图在绘制时常用的比例为（）。
A.1：500
B.1：1000
C.1：1500
D.1：2000
E.1：2500
Many children enjoyed the book Harry Potter ________ by JK Rowling.[ ]
A. who writes
B. which is writing
C. was written
D. which was written
