光在摄影上有两个作用:一是使感光胶片有了()的可能;二是使被摄物体有了形态,色彩,()
参考答案:感光、质感
撑上支撑后的自行车能稳稳地停在地上,是因为三角形具有( )性。
--You've given us a wonderful Chinese dinner, Mrs. Wang. --()
A.Come again when you are free
B.Oh,I don’t think Icooked very well.
C.It’s not necessary for you to say so.
D.I’m glad you enjoyed it.