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【单选题】
目前,国内、外普遍规定于 ( ) 分别测定样品的培养前后的溶解氧,二者之差即为 BOD5 值,以氧的 mg/L 表示。A.
（ A ） 20±1 ℃ 100 天
B.
（ B ）常温常压下 5 天
C.
（ C ） 20±1 ℃ 5 天
D.
（ D ） 20±1 ℃ 7 天
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反馈参考答案：
举一反三
【单选题】The first person who gave him money
A.
was an old lady．
B.
stopped and listened for a while．
C.
dropped the money by mistakes．
D.
didn’t want to be noticed.
【判断题】Shennong is said to be the first person who discovered the functions of tea.
A.
正确
B.
错误
【单选题】The first person who used Confucianism to express Christianity was from Japan.
A.
Y
B.
N
C.
NG
【单选题】中心静脉压高血压低提示。
A.
心功能不全血容量正常。
B.
血容量不足。
C.
容量血管床过度收缩。
D.
心功能不全或血容量相对过多。
E.
心功能不全或血容量不足。
【单选题】The first person who summarized the human cultural phenomenon in the sense of cultural anthropology is the British scholar .
A.
Bagby
B.
A. J. Toynbee
C.
Edward Tylor
D.
Raymond Henry Williams
【单选题】The first person who gave him money
A.
was an old lady．
B.
stopped and listened for a while．
C.
dropped the money by mistakes．
D.
didn’t want t0 be noticed．
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