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【单选题】
PEPC 的最适 pH 值为( )。A.
5.0~5.5
B.
6.0~6.5
C.
7~7.5
D.
8~8.5
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皮皮学刷刷变学霸
举一反三
【简答题】继电器的作用 有哪些?
【单选题】禁毒志愿者应当年满18岁，具有社会责任感和奉献精神;遵纪守法，热心禁毒工作;每年自愿参加()小时以上禁毒志愿服务工作;具有合法的身份证明，且具备相应的体能和服务技能。
A.
12
B.
24
C.
36
D.
48
【单选题】_____,I hardly think I would have recognized him.
A.
Should his name not be mentioned
B.
Had someone not mentioned his name
C.
If someone did not mention his name
D.
If someone had mentioned his name
【单选题】I think I would have died of ________.
A.
embarrass
B.
embarrassing
C.
embarrassed
D.
embarrassment
【简答题】Frankly, I think I would have not become a writer if I had not been forced to leave everything behind and start ______. (formulate, detect, addict, anew, permanent)
【单选题】______, I hardly think I would have recognized him.
A.
Should his name not be mentioned
B.
Had someone not mentioned his name
C.
If someone did not mention his name
D.
If his name were not mentioned
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