若H2SO4、Na2SO4、Na2CO3、NaCl、NaNO3、Cu(NO3)2

题型:推断题

问题:

若H2SO4、Na2SO4、Na2CO3、NaCl、NaNO3、Cu(NO32、HNO3七种溶液中取出其中的两种,进行混合及有关实验,所观察到的现象已记录在下表中.试据各步实验及其现象先进行分步推断(既实验进行到该步所作出的某物质肯定存在、否定存在或可能存在的判断),再综合推断所取出的2种溶液的可能组合.

考点:盐的性质酸的性质溶液的酸碱性与pH值
题型:推断题

Learning a foreign language is difficult for many learners. The following tips may help you learn a foreign language quickly.

Reading aloud

When you start learning a foreign language, you should read aloud. Reading aloud instead of reading lowly only to yourself helps you in remembering. It helps with pronunciation, too.

Building your vocabulary

You’ll have to make a few word lists, you have to memorize and review them regularly. You may review the word lists at least once a day for two weeks.

Learning grammar

Learning the grammar of a foreign language is a dry and boring task. But it can speed your language learning. Don’t jump to learn tenses(时态), it’s better to be done after you’ve learned some of the language. The most important thing is that you shouldn’t worry about the mistakes you’ll make when you start. If you do like this, you’ll learn the language better.

Watching TV and movies

This is a wonderful way to learn a foreign language quickly. You can watch TV shows in the language you are learning. They’ll help you a great deal with the vocabulary as well as catching what others say and also your pronunciation.

根据短文内容,选择正确答案,(5分)

小题1: Reading aloud while learning a foreign language helps in ____________.

A.talking to people

B.understanding words

C.learning grammar quickly

D.pronouncing words correctly小题2:Which of the following is important in building one’s vocabulary of a foreign language?

A.Writing the words again and again.

B.Listening to tapes in the language.

C.Reviewing words from time to time

D.Reading more articles in the language.小题3: When learning the grammar of a foreign language, you should _____________.

A.learn tenses first

B.try not to make mistakes

C.make at least one word list

D.learn from the mistakes you make小题4:The underlined phrase “ a great deal” means “___________”.

A.much

B.little

C.a few

D.never小题5:Which is the best title for the passage?

A.Traditional ways of learning English

B.Some advice on learning a foreign language

C.The important of learning a foreign language

D.How to deal with difficulties in learning a language

题型:推断题
在验证力的平行四边形定则的实验中,下列那些方法不能减小实验误差(  )

A.两个分力F1、F2间的夹角要尽量大些

B.两个分力F1、F2的大小要尽量大些

C.画力的图示时,应选定适当的标度,尽量使图示画得大一些

D.实验中,弹簧秤必须与木版平行,读数时视线要正对弹簧秤刻度

题型:推断题

上肢、小腿()

A.角质层厚而真皮层薄 

B.影响外观 

C.为大张自体皮主要供皮区 

D.皮肤薄,色泽与颜面接近 

E.全身皮肤最厚部位,愈合快

题型:推断题

承销金融在3亿元以下,成员在( )家以上的承销团,可设2~3家副主承销商。

A.10

B.8

C.5

D.3

题型:推断题

铁路客运企业文化的功能有导向功能、()、()、激励功能

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