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举一反三
【单选题】Section BDirections: There are 2 passages in this section．Each passage is followed by some questions or unfinished statements．For each of them there are four choices marked A, B, C and D．You should de...
A.
Why People Marry
B.
Marriage Customs in India Are Changing
C.
Why Indians Read the Sunday Newspaper
D.
Living Abroad
【单选题】下列可以算出n 的阶层的是()
A.
reduce (lambda x,y: x*y, range (1, n ))
B.
reduce (lambda x,y: x+y, range (1,n +1))
C.
reduce (lambda x,y: x*y, range (1,n +1))
D.
reduce (lambda x,y: x+y, range (1,n ))
【多选题】关于测定BOD的记述，（）项是错误的。
A.
所谓BOD是水中的好氧微生物消耗溶解氧的量
B.
不能立即进行测定BOD的试样，应在0—100C的暗处保存
C.
稀释试样用的接种稀释水，应调节pH至7.2
D.
当试样含悬浮物时，用慢速定量滤纸过滤后，再取适当量的水样进行测定