该图最有可能是何种类型的白内障（）
A.中毒性白内障
B.先天性白内障
C.外伤性白内障
D.后发性白内障
E.以上都不是
参考答案：C
Not until the press reported the pollution _________ why the water supply had been cut off.
A．people did know
B．people had known
C．did people know
D．had people known
敷设仪表电缆时的环境温度，塑料绝缘电缆不应低于( )。
A．1℃
B．0℃
C．3℃
D．4℃
