未经曝光的胶片,经暗室处理后产生的一定黑度称为本底灰雾度。
参考答案:对
下图是亚洲东部2012年12月6日14时的海平面等压线(单位:百帕)天气图。读图回答下列问题。
小题1:此时,上海的天气状况为
A.受台风影响,狂风暴雨
B.受冷锋影响,寒冷大风
C.受暖锋影响,阴雨连绵
D.受高压影响,晴朗干燥小题2:甲天气系统中心气压为998百帕,它对菲律宾造成的灾害最可能是
A.干旱
B.洪涝
C.寒潮
D.沙尘暴
改错。
1. Eddie, have you see my food?
A B C D ( ) __________
2. I have known his sister five years ago.
3. I real don't know where he is.
4. It has become more difficult seeing my old friend.
A B C D ( ) —————
5.I enjoy chating with you.