开始画一幅图时可以使用图形样板,AutoCAD的图形样板文件用()作为扩展名。
A.dws
B.dwt
C.dxf
D.dwg
参考答案:B
I’m a little __________ about what I read in the press. Would you please give me a full __________ of what is really happening in Africa?
A.uncertain, retell
B.skeptical, distribution
C.unsure, description
D.doubt, account
衣服上面的油墨可以用()擦拭
A、0%氨水
B、5%~10%食盐水
C、5%苏打溶液
D、硼砂溶液