【題目】實(shí)驗(yàn)室制備氨氣,檢驗(yàn)是否收集滿的正確方法是( )
A.用手扇動(dòng)收集的氣體,有氣味則已收集滿
B.將潤(rùn)濕的淀粉KI試紙接近瓶口,試紙變藍(lán)則已收集滿
C.將潤(rùn)濕的紅色石蕊試紙伸入瓶?jī)?nèi),試紙變藍(lán)則已收集滿
D.用玻璃棒一端蘸取濃鹽酸,接近瓶口,產(chǎn)生大量白煙,證明已收集滿
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【題目】七選五
根據(jù)短文內(nèi)容,從短文后的選項(xiàng)中選出能填入空白處的最佳選項(xiàng)。選項(xiàng)中有兩項(xiàng)為多余選項(xiàng)。
Learning English is challenging because of the various rules and exceptions to the rules. The best way to learn English is to hear it spoken and repeat the words as you hear them. 【1】You will learn how to make English a daily part of your life in order to learn to speak it quickly.
【2】 Ask a friend to help you write letters of English alphabet on index cards. You should write a letter on each card. Practise the letters by mixing up the cards and saying the letters. You can ask your friend to help you pronounce the letters and quiz you on your knowledge.
Make your own videos in English. If you have a video camera, you can tape yourself speaking English and practice along with your own video. 【3】 Watch your videos daily, and repeat what is being said.
Get a private tutor. A professional English instructor can give you one-on-one instruction that will help you understand the rules of English. Your instructor can teach you how to write and speak English. 【4】You can also inquire at your local community college.
Watch movies with English subtitles. When watching a movie in your native language, use the English subtitles so you will understand the connection between your language and English.
【5】You will make mistakes, and that is OK. You need to practice English as much as possible in order to quickly learn to speak the language fluently.
A. Learn the English alphabet.
B. Use every opportunity to speak English.
C. You can subscribe some English magazines to learn English.
D. Constant repetition is the key to remembering words in English.
E. If you have any difficult points, you can consult your dictionary at any time..
F. You can find an English tutor by placing an advertisement in your local newspaper.
G. You can make a play in which you and a friend are having a simple conversation in English.
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【題目】
注意:
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