【多选题】【消耗次数：1】
渗透管沟的设置要求正确的是().
①
A.地面雨水进入渗透管前宜设渗透检查井
②
B.渗透检查井的间距应不大于渗透管管径的100倍
③
C.渗透检查井应设米的沉砂室
④
D.渗透管沟应能进行疏通，渗透管的管径不应小于200mm
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相关题目
【多选题】
关于渗透，下列说法正确的是（）
①
A.渗透必须满足两个条件：半透膜存在和膜两边的溶液必须有浓度差存在
②
B.渗透的方向是低浓度向高浓度渗透
③
C.渗透的方向是高浓度向低浓度渗透
④
D.只要有半透膜存在，膜两边的溶液就可以发生渗透现象
⑤
E.渗透压相等的溶液称为等渗溶液
随机题目
【单选题】
While
reading the newspaper, ____.
①
a
colorful advertisement caught my eyes
②
my attention was attracted by an advertisement
③
I
was attracted by a colorful advertisement
④
What attracted my eyes was a colorful
advertisement
【单选题】
Although she was frightened, she answered with a ____ voice.
①
quiet
②
silent
③
still
④
calm
【单选题】
Neither Sandynor her brother ____ the concert.
①
is going to
②
are going to
③
are going to go
④
is go