問題詳情
28．下列关于有机物的说法正确的是
(A)乙醇、乙烷和乙酸都可以与钠反应生成氢气
(B)75%（体积分数）的乙醇溶液常用于医疗消毒
(C)苯和乙烯都可使溴的四氯化碳溶液褪色
(D)石油分馏可获得乙酸、苯及其衍生物
(A)乙醇、乙烷和乙酸都可以与钠反应生成氢气
(B)75%（体积分数）的乙醇溶液常用于医疗消毒
(C)苯和乙烯都可使溴的四氯化碳溶液褪色
(D)石油分馏可获得乙酸、苯及其衍生物
參考答案
答案：B
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)
內容推薦
- The lawyer seldom wears anything other than a suit_________ theseason.(A) whatever (B) wherever
- 36．对于反应2SO2(g)＋O2(g) 2SO3(g)，能增大正反应速率的措施是(A)通入大量O (B)增大窗口容积(C)移去部分SO (D)降低体系温度
- Which of the following would be the best title for this text?(A) Choice of Good Products (B)
- The English spoken in the United States is only slightly differentfrom_________ spoken in Englan
- Let’s learn to use the problem we are facing_________ astepping-stone to future success.(A) to (
- 35．下列有关Cl、N、S等非金属元素化合物的说法正确的是(A)漂白粉的成分为次氯酸钙(B)实验室可用浓硫酸干燥氨气(C)实验室可用NaOH溶液处理NO2和HCl废气(D)Al2(SO4)3可除去碱性
- 27．根据表1信息和，判断以下叙述正确的是表部分短周期元素的原子半径及主要化合价 (A)氢化物的沸点为H2T＜H2R (B)单质与稀盐酸反应的速率为L＜Q (C)M与T形成的化合物具有两
- The purpose of writing these four texts is to ______.(A) tell the readers the latest news(B)
- The weather was_________ cold that I didn’t like to leave myroom.(A) really (B) such (C) too (D)
- The performance_________ nearly three hours, but few people leftthe theatre early.(A) covered (B
內容推薦
- I like getting up very early in summer. The morning air is sogood_________.(A) to be breathed (B
- Pulling heavy suitcases all day in the summer is hard work, especially when you’re a thin 14-year-ol
- ---Sorry, I made a mistake again.---_________. Practice more and you’ll succeed.(A) Never mind (
- 29．下列各组离子一定能大量共存的是(A)在含有大量［Al(OH)4］－的溶液中：NH4＋、Na＋、Cl－、H＋(B)在强碱溶液中：Na＋、K＋、CO32－、NO3－(C)在pH＝12的溶液中：NH4
- 38．细胞内各细胞具有一定的结构和功能，对图8中结构①的叙述，正确的是 (A)在不同植物细胞内其数量基本相同 (B)是植物合成蛋白质的主要细胞器 (C)是植物进行光合作用产生有机物的细胞器 (D)含有
- --- Have you known Dr. Jackson for a long time?---Yes, since she_________ the Chinese Society.(A
- What does the father's advice imply?(A) It is wrong to give more pay to the passengers.
- After the birth of my second child, I got a job at a restaurant. Having worked with an experienced
- 30．下列反应的离子方程式正确的是(A)钠与水的反应：Na＋H2O＝Na＋＋OH－＋H2↑(B)氯气与水反应：Cl2＋H2O＝2H＋＋Cl－＋ClO－(C)氢氧化铝中和胃酸：Al(OH)3＋3H＋＝A
- 39．取少量酵母菌液放入血球计数板直接记数，测得的数目是(A)活细胞数 (B)死细胞数(C)菌落数 (D)细胞总数
- You’re driving too fast. Can you drive_________?(A) more slowly a bit (B) slowly a bit more(C) a
- 40．下列过程存在无氧唿吸的是(A)植物叶片在光下放出O2 (B)动物细胞内的糖分解为H2O和CO2(C)酵母细胞不产酒精的唿吸过程 (D)苹果贮藏期间果肉积累酒精
- The wet weather will continue tomorrow when a cold front_________ to arrive.(A) is expected (B)
- ---Which of the two computer games did you prefer?---Actually I didn’t like_________.(A) both of
- 教育過程應儘量符合學生的自發意願，儘量避免強迫灌輸，要顧及到學生的身心發展與自由意志，這種論點屬於下列哪一個教育規準？(A)合自願性 (B)合認知性 (C)合價值性 (D)合意志性。
- Why was the new type of pineapple selling well?(A) It was rich in nutrition and tasted nice.
- The underlined word “fixture” in Paragraph 3 probably refers to something _________.(A) that
- At the Snowdonia Centre, the beginners’ costs of ￡57 do not cover .(A) food (B) rooms(C) bod
- We learn from the last paragraph that Del Monte _________.(A) slowed other companies to deve
- Edward Wilson is America’s, if not the world’s, leading naturalist. In The Future of Life, he takes
- It is often necessary to release a fish, that is , set it free after catching, because it is too sma
- —It’s a long time since I saw my sister. — ______ her this weekend?(A) Why not visit (B) why not
- How many species are most important to our present food supply?(A) Twenty. (B) Eighty. (C) O
- Last week my youngest son and I visited my father at his new home in Tucson, Arizona. He moved there
- Which of the following will probably make a fish ill?(A) Taking the hook off it. (B) Removin