颁发有关整个工程的移交证书之后（）天之内，承包人应向工程师呈交一份竣工报表。
A、84天
B、65天
C、56天
D、21天
参考答案：D
锐利度的表达式：S=（D-D）/H=K/H其中K代表的是 （）
A.锐利度
B.对比度
C.模糊值
D.光密度
E.灰雾度
This picture was taken when my father was a child and even I myself couldn’t _____.
A．find him out
B．pick him out
C．put him out
D．take him out
