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【单选题】
I was looking for a birthday gift for my mother, but I couldn’t find ______ suitable.A.
something
B.
anything
C.
nothing
D.
everything
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举一反三
【单选题】Modem mass-production methods lower the cost of making goods, and thus give us better values. At the same time, American ingenuity and science are constantly at work improving the quality of products....
A.
cell
B.
soft paper
C.
organization
D.
thin fibre
【单选题】They put___on the government to lower taxes and give laid-off workers necessary health care.
A.
temper
B.
mood
C.
consciousness D, pressure
【单选题】有一交流电瞬时值表达式为 。则下面叙述正确的是
A.
该交流电的最大值是 A。
B.
该交流电的最大值是10A。
C.
该交流电的频率是314Hz。
D.
该交流电的周期是314s。
【简答题】填写图中【数字】所指结构名称:
【简答题】to give a lower value to something
【单选题】欲使CaCO 3 在水溶液中的溶解度增大，可以采用的方法是 [ ]
A.
加入1.0 mol·L -1 Na 2 CO 3 溶液
B.
加入2.0 mol·L -1 NaOH溶液
C.
加入0. 01 mol·L -1 CaCl 2 溶液
D.
降低溶液的pH
【简答题】A．Criticize him for the lower marks and praise him for the good. B．Praise him and give some suggestions for further improvement. C．Praise him for the lower marks and reward him. D．Criticize him for th...
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