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【多选题】
吖啶酯的发光特点包括A.
发光背景噪音低
B.
化学反应简单
C.
发光反应快速而无需催化剂
D.
发光反应标本中抗凝剂（如EDTA）影响
E.
血清非特异性酶的影响
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A.
a Chinese student tends to be very active
B.
an American student likes to make trouble
C.
a Chinese student likes to puzzle the teacher
D.
an American student tends to be vigorous
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A.
good, well
B.
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C.
well, well
D.
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A.
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B.
present
C.
prospect
D.
presence
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【单选题】A salinity indicator is used to determine the _____.
A.
cause of salt contamination
B.
location of salt water contamination
C.
chemical makeup of feed-water
D.
level of alkalinity in condensate
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