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举一反三
【单选题】When stars like our Sun die, they bloat to become red giants and then eject gigantic clouds of gas and dust into space. Increasingly, however, scientists found themselves at a profound loss to explain...
A.
explain-the possible way of death of our Sun.
B.
show the two types of red giants.
C.
discuss on the way of red giants to become white dwarfs.
D.
explore the origin of life.
【多选题】10875-D101自动切换至备用过滤器的触发条件有（）。
A.
10875-D101报警压差值为100KPa
B.
运行时间达到12h
C.
累计流量达到360t
D.
累计流量达到720t
【单选题】多介质过滤器异常停运，又恢复运行初期，应注意其出水水质，若出水水质较差则将高盐出水监控池出水改进（ ）。
A.
高盐污水罐
B.
高盐事故罐
C.
低盐事故罐
D.
低盐事故罐