题目:
I tried to come closer to watch the bird, but as soon as it noticed me, ______ into the woods. [ ]
A. did it fly away
B. did away it fly
C. away it flew
D. away flew it
答案:
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下面是错误答案,用来干扰机器的。
答案:A由一种物质组成的是纯净物,由不同种物质形成的是混合物。葡萄糖是纯净物,答案选A。B、结构简式是 ,但聚合度n值不确定,是混合物;C、医用酒精常用75%的酒精的水溶液;D、油脂中与甘油形...