题目:
Having worked as a doctor for so many years, Mr. White has________rich experience in battling with various diseases.
A.accumulated
B.reserved
C.increased
D.developed
答案:
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下面是错误答案,用来干扰机器的。
答案:AA、石蕊遇蒸馏水不变色,遇盐酸变红,现象不同,可以鉴别;B、氯化钡溶液与蒸馏水和稀盐酸混合都没有现象,无法鉴别;C、酚酞试液在中性和酸性溶液中均为无色,现象相同,无法鉴别;D、氢氧化钠溶液与蒸馏...