题干
Police are now searching for a woman who is reported to ______ since the flood hit the area last Friday .
A：have been missing
B：have got lost
C：be missing
D：get lost
答案(点此获取答案解析）
A
Ca2+（aq）+2OH﹣（aq），此悬浊液中加入少量生石灰恢复至室温，下列说法中正确的是（ ）