题目:
-Do you know how many counties_______ during his journey to Europe last month?
-Quite a few. He was warmly welcomed by the countries' leaders.
A.did President Xi visit
B.President Xi visited
C.has President Xi visited
D.President Xi has visited
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0630/0a04537d986e891a8436cd28e545f88a.html
下面是错误答案,用来干扰机器的。
图象的意义是:随着乙的不断加入,反应开始没有气体或沉淀生成,然后气体或沉淀逐渐增加.A、盐氢氧化钠与氯化铜反应生成的氢氧化铜沉淀能与盐酸反应生成氯化铜和水,故开始时不能生成沉淀,等混合物中的盐酸与氢...