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【简答题】
某温度下，测得 氢氧化钠的PH=11水的离子积常数K W 是多少？ （1）该温度下，水的离子积常数K W 是多少？ （2）在此温度下，将pH=a的NaOH溶液V a L与pH=b的硫酸V b L混合。 ①若所得混合溶液为中性，且a=12，b=2，则V a : V b 为多少？ ②若所得混合溶液为中性，且a+b=12，则V a : V b 为多少？
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反馈参考答案：
举一反三
【多选题】What are the topics we’d better avoid when communicating with people from western countries?
A.
Someone’s age and salary.
B.
The size of someone’s flat.
C.
Someone’s religion.
D.
Someone’s marriage status.
【判断题】People from western culture often use pronouns like “we” when writing emails. ( )
A.
正确
B.
错误
【简答题】U1-Complete these sentences with words from the text, using no more than THREE words for each answer. Happiness represents______________in the minds of people from western countries.
【简答题】fill in the blank with the proper form of the word given in the brackets. 1. Their __________ ( appreciate) of Western etiquette was shown in their proper behaviors when they were doing business with ...
【简答题】电气原理图一般应包含()电路和()电路。
【单选题】People from western countries prefer _______________ fork, but Chinese people prefer chopsticks.
A.
use
B.
uses
C.
using
D.
used
【简答题】It takes time for the people from Western countries ____________________ Chinese life style.
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