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【多选题】
Point-source pollution_________. ()
A.
affects the nearby area around the source
B.
are relatively easier to control
C.
is difficult to control
D.
affects far away places
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举一反三
【多选题】The chemicals pollutants in water include _________. ()
A.
crude oil and various petroleum products
B.
fertilizers,
C.
chlorinated solvents
D.
organic solvents
【多选题】Water pollutants can be divided into _________. ()
A.
chemical pollutants
B.
biological pollutants
C.
radiological pollutants
D.
physical pollutants
【多选题】The biological pollutants include _________. ()
A.
various microorganisms
B.
viruses
C.
worms
D.
algae
【单选题】Which pair of English phonemes differs in the manner of articulation?______
A.
/d/ and /n/
B.
/k/ and /t/
C.
/s/ and /z/
D.
/t/ and /b/
【单选题】Which pair of English phonemes differs in the place of articulation? _____
A.
/t/ and /d/
B.
/ʃ/ and /ʒ/
C.
/θ/ and / ð/
D.
/m/ and /n/