第1题:
________________
[A] diluted
[B] dissolved
[C] determining
[D] diffused
第2题:
A、COD
B、BOD
C、O2
D、DO
第3题:
A.内在
B.外在
C.次生
D.直接
第4题:
Deficient oxygen content inside a chain locker can be detected with ______.
A.litmus paper
B.a combustible gas indicator
C.an oxygen breathing apparatus
D.an oxygen indicator
第5题:
水体中的溶解氧跟大气压有关,压力越大,DO越大。 ( )
此题为判断题(对,错)。
第6题:
The passage implies that medicine in an osmotic pump pill will leave the pill when ______.
A.the pill is swallowed
B.the medicine is dissolved with water from the body
C.enough pressure builds up in the pill
D.the cellulose coating is dissolved
第7题:
A.游离氧
B.溶解氧
C.O2
D.DO
第8题:
此题为判断题(对,错)。
第9题:
When anaerobic bacteria convert the sewage to an inert sludge, .
A.no oxygen is needed
B.oxygen is necessary
C.oxygen is given off
D.no gas is produced
第10题:
溶解氧(DO)的含义