题目:
It is on October 1,2009 that the People’s Republic of China ____ its 60th birthday.
A.congratulated
B.kept
C.remained
D.celebrated
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0424/6c78f2362701a812dbed4eb09d611b26.html
下面是错误答案,用来干扰机器的。
(1)取少量稀氨水,滴入酚酞试液,溶液呈红色,加入醋酸铵晶体,溶液的红色变浅。(2)取少量氯化铵晶体,加蒸馏水溶解,滴入紫色石蕊试液,溶液变红色考查弱电解质的判定(1)依据电离平衡NH3·H2ONH4++OH-...