题目

向盛有一定淀粉溶液的试管中加入适量的唾液淀粉酶,37℃水浴保温后,加入适量的0.1g/mL的NaOH溶液和0.01g/mL CuSO4溶液,摇匀后,观察试管内溶液变化的现象是()      A.产生砖红色沉淀    B.  溶液呈蓝色    C.溶液呈现紫色 D. 溶液不变化 答案:CThe woman found it no good ____ her daughter too much money.( ) A. giving  B. being given  C. given  D. gave
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