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【单选题】
若函数 在点 处的极限存在,则A.
在 处的函数值存在且等于极限值
B.
在 处的函数值存在,但不一定等于极限值
C.
在 处的函数值未必存在
D.
如果 存在,必等于极限值
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举一反三
【单选题】Experienced teachers make ______ mistakes than beginners.
A.
lesser
B.
fewer
C.
not many
D.
very few
【单选题】From the interview, we learn that Tom was ______.
A.
very ambitious and calculating
B.
quite experienced in dealing with kids
C.
anxious to start up his career in a small cottage
D.
able to do some gardening
【单选题】The situation wasn’t very good, but I ________ many worse situations.
A.
was experiencing
B.
experienced
C.
would experience
D.
had experienced
【单选题】某弱酸性指示剂的解离常数 K HIn =2×10 -5 ,此指示剂的 PH 变色范围为()
A.
4.7～6.7
B.
5.7～7.7
C.
6.7～8.7
D.
3.7～5.7
【简答题】5).He was very experienced in selling optical products. He was turned down by that spectacles company. a. He was very experienced in selling optical products, ________he was turned down by that ...
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