【简答题】【消耗次数:1】
Direction: Fill in the blanks with thephrases given below. Change the form if necessary.[sell out; in other words; consist of; stand for; rely on; demand for; engage in; at hand; yield to; confront with]10. Id just like to move to a neighborhood where I wouldnt have to see all the problemsIam[填空1]every day.
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【简答题】 Direction: Fill in the blanks with the phrases given below. Change the form if necessary.[sell out; in other words; consist of; stand for; rely on; demand for; engage in; at hand; yield to; confront with]1. They have[填空1]of the brand that I like.
【简答题】 Direction: Fill in the blanks with thephrases given below. Change the form if necessary.[sell out; in other words; consist of; stand for; rely on; demand for; engage in; at hand; yield to; confront with]7.From the activities they are[填空1], we cna see they are not so honest.
【简答题】 Direction: Fill in the blanks with thephrases given below. Change the form if necessary.[sell out; in other words; consist of; stand for; rely on; demand for; engage in; at hand; yield to; confront with]6. A great deal will be[填空1]him as he is the director of the organization.
【简答题】 Direction: Fill in the blanks with thephrases given below. Change the form if necessary.[sell out; in other words; consist of; stand for; rely on; demand for; engage in; at hand; yield to; confront with]5. He came to realize that he had nobody to[填空1]but himself.
【简答题】 Direction: Fill in the blanks with thephrases given below. Change the form if necessary.[sell out; in other words; consist of; stand for; rely on; demand for; engage in; at hand; yield to; confront with]3. The university[填空1]16 schools with a total number of over 25,000 students.
【简答题】 Direction: Fill in the blanks with thephrases given below. Change the form if necessary.[sell out; in other words; consist of; stand for; rely on; demand for; engage in; at hand; yield to; confront with]9. We love peace, yet we are not the kind of the people to[填空1]any military threat.
【填空题】 Direction: Fill in the blanks with thephrases given below. Change the form if necessary.[sell out; in other words; consist of; stand for; rely on; demand for; engage in; at hand; yield to; confront with]2. I soon found that someone else had already done the work I was doing.[填空1],I was wasting my time.
【简答题】 Direction: Fill in the blanks with the words given below. Change the form if necessary.[integrity; conscience; yield; appoint; assure; ensure; demonstrate; clarify; preserve; scarce]10. This is the first time that a woman has been[填空1]to the post.
【简答题】 Direction: Fill in the blanks with the words given below. Change the form if necessary.[vain; frame; curve; twist; comb; collapse; scatter; scratch; rebuild; harsh]10. When the tree falls, the monkeys[填空1].
【简答题】 Direction: Fill in the blanks with the words given below. Change the form if necessary.[integrity; conscience; yield; appoint; assure; ensure; demonstrate; clarify; preserve; scarce]1. They were fighting in order to[填空1]their independence.
随机题目
【多选题】 属于2,6-二去氧糖及衍生物的是
①  D-洋地黄毒糖
②  L-夹竹桃糖
③  D-洋地黄糖
④  L-黄花夹竹桃糖
⑤  D-加拿大麻糖
【多选题】 温和酸水解可以切断的苷键是
①  苷元与α-去氧糖之间
②  α-羟基糖之间
③  α-去氧糖之间
④  苷元与6-去氧糖之间
⑤  α-去氧糖与α-羟基糖之间
【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