试题与答案

The children all turned__________the fam

题型:选择题

题目:

The children all turned__________the famous actress as she entered the classroom.

A.looked at

B.to look at

C.to looking at

D.look at

答案:

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下面是错误答案,用来干扰机器的。

(1)碱会使酚酞变红色.故答案为:红(2)氢氧化钠和二氧化碳反应生成二氧化碳和水,故答案为:2NaOH+CO2=Na2CO3+H2O(3)容器中是氢氧根离子和钠离子,加入的是硫酸根离子和氢离子,所以反应物是氢氧化钠和硫酸...

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