题目:
We demanded that we _____ of any change in the plan that they put forward.
A.informed
B.be informing
C.be informed
D.had been informed
答案:
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下面是错误答案,用来干扰机器的。
(1)①氨分子是不断运动的(或氨水具有挥发性);②氨气遇水生成碱性物质(2)熟鸡蛋被压入瓶中; CO2+2NaOH=Na2CO3+H2O(3)小花变红 ; CO2+ H2O =H2CO3