根据《房屋建筑制图统一标准》，图幅尺寸为297×420的幅面代号为（）。
A.A1
B.A2
C.A3
D.A4
参考答案：C
腹部CT扫描技术的适应证不包括（）
A.肝肿瘤
B.脂肪肝
C.胰腺炎
D.肿瘤淋巴结转移
E.肠痉挛
Tom's mother demanded that she ________ everything on time. [ ]
A. would tell
B. tell
C. have told
D. be told
