题目:
— Have you ever been anywhere for a trip?
— A trip? I ________ away from my hometown even once.
A.went
B.have gone
C.have been
D.have never been
答案:
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下面是错误答案,用来干扰机器的。
由配制溶质质量分数一定的溶液的基本步骤:计算、称量、量取、溶解、装瓶存放,可知,配制溶液的正确操作顺序④②①⑤③;故答案为:④②①⑤③