【单选题】【消耗次数:1】
Language learning is a slow process, which a lot of effort, time and practice.
requires
leaves
pays
offers
参考答案:
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相关题目
【单选题】 Which of the following belong to pronunciation perception practice?
①  using minimal pairs, odd one out
②  Which order, completion
③  Same or different
④  All of the above.
【单选题】 —What about learning a foreign language in the summer holiday?— .
①  It’s a good idea.
②  Yes, I agree with you.
③  No, I don’t think so.
④  yes,perfect.
【单选题】 Body language contains a lot of information. So, ______ your body language
①  be likely to
②  be aware of
③  be friendly with
④  be patient with
【单选题】 What are the purposeful preparation that a language teacher normally receives before he starts the practice of teaching?
①  Learning from other’s experiences
②  Learning the received knowledge
③  Learning from one’s own experiences as a teacher
④  All of the above.
【单选题】 Which of the following is NOT right about Mark Twains style of language?
①  His sentence structures are long, ungrammatical and difficult to read.
②  His words are colloquial, concrete and direct in effect.
③  His humor is remarkable and characterized by puns, straight-faced exaggeration, repetition and anti-climax.
④  His style of language had exerted rather deep influence on the contemporary writers.
【单选题】 According to the text, which of the following is NOT one of the possible activities for you to practice speaking English at school?
①  To talk to native speakers on campus.
②  To speak English to the waitress in English as you pay for a meal in a restaurant.
③  To rehearse aloud by yourself.
④  To talk with your classmates in English.
【判断题】 He spends a lot of time play computer games.
①  正确
②  错误
【单选题】 Which type does the following production practice belong to? She sells sea shells on the seashore.
①  Make up sentences
②  Using meaningful context
③  Using pictures
④  Using tongue twisters.
【单选题】 I have spent a lot of time_______repairing the machine.
①  at
②  /
③  on
【单选题】 Which of the following types of lexicology refers to the description of the vocabulary of a given language?
①  General lexicology
②  Special lexicology
③  Historical lexicology
④  Descriptive lexicology
随机题目
【单选题】 用于检测甲型强心苷元的试剂是
①  醋酐-浓硫酸
②  三氯化铁-冰醋酸
③  三氯化锑
④  碱性苦味酸
⑤  对二甲氨基苯甲醛
【单选题】 毒毛花苷K通过毒毛花双糖酶水解得到的产物是
①  毒毛花苷元-加拿大麻糖-葡萄糖 + 葡萄糖
②  毒毛花苷元-加拿大麻糖 +(葡萄糖)2
③  毒毛花苷元 + 加拿大麻糖 +(葡萄糖)2
④  毒毛花苷元 + 加拿大麻糖-(葡萄糖)2
⑤  毒毛花苷元 + 加拿大麻糖-葡萄糖 + 葡萄糖
【单选题】 甲型强心苷元与乙型强心苷元主要区别是
①  甾体母核稠合方式
②  C10位取代基不同
③  C13位取代基不同
④  C17位取代基不同
⑤  C5-H的构型
【单选题】 检测α-去氧糖的试剂是
①  醋酐-浓硫酸
②  三氯化铁-冰醋酸
③  三氯化锑
④  间二硝基苯
⑤  苦味酸钠
【单选题】 Ι型强心苷糖与苷元正确的连接方式是
①  苷元C14-O-(α-羟基糖)X
②  苷元C3-O-(2,6-二去氧糖)X-(α-羟基糖)Y
③  苷元C3-O-(α-羟基糖)X
④  苷元C14-O-(6-去氧糖)X-(α-羟基糖)Y
⑤  苷元C3-O-(6-去氧糖)X-(α-羟基糖)Y
【多选题】 精制皂苷时,先将粗皂苷溶于甲醇或乙醇,然后加何溶剂可使皂苷析出
①  乙醚
② 
③  正丁醇
④  丙酮
⑤  乙醚-丙酮(1∶1)
【多选题】 提取皂苷类常用的方法是
①  稀醇提取-正丁醇萃取法
②  碱提取-酸沉淀法
③  铅盐沉淀法
④  酸提取-碱沉淀法
⑤  稀醇提取-大孔吸附树脂法
【多选题】 与醋酐—浓硫酸(20∶1)试剂呈阳性反应的是
①  三萜皂苷
②  强心苷
③  甾体皂苷
④  三萜类
⑤  生物碱
【多选题】 皂苷的性质有
①  脂溶性
②  水溶性
③  发泡性
④  溶血性
⑤  与甾醇生成分子复合物
【多选题】 区别三萜皂苷与甾体皂苷的方法
①  泡沫试验
②  三氯化铁-冰醋酸
③  氯仿-浓硫酸反应
④  20%三氯醋酸反应
⑤  Liebermann-Burchard反应