问题 选择题

迷迭香酸是从蜂花属植物中提取得到的酸性物质,其结构如图.下列叙述正确的是(  )

A.迷迭香酸属于芳香烃

B.1mol迷迭香酸最多能和含6mol Br2的浓溴水反应

C.迷迭香酸可以发生水解反应、取代反应和酯化反应

D.1mol迷迭香酸最多能和含5mol NaOH的水溶液完全反应

答案

A.该有机物中含有O,分子式为C18H16O8,为烃的衍生物,故A错误;

B.分子中含有4酚羟基,苯环上可被取代的H有6个,且含有1个C=C,可与溴发生加成反应,则1mol迷迭香酸最多能和含7molBr2的浓溴水反应,故B错误;

C.分子中含有-COOH,可发生取代反应和酯化反应,含有-COO-,可发生水解反应,含有酚羟基,可发生取代反应,故C正确;

D.分子中含有4个酚羟基、1个羧基和1个酯基(水解生成醇和羧基),则1mol迷迭香酸与足量NaOH溶液反应,最多消耗6molNaOH,故D错误.

故选C.

完形填空

第Ⅱ卷(非选择题:共25分)

I.完成句子: 根据首字母或汉语提示填入所缺的词,每空一词. ( 每空0.5分,满分15分)

76、It is ______(明显的) that our teacher is very disappointed. Can’t you see it from her face?

77、Please f_____ me for being late. The traffic at this time is very heavy.

78、It’s important to eat a ______ (均衡的) diet.

79、She is starving herself to lose w_______.

80、Jim’s father didn’t ______ (允许) him to join the school football team

81、Nobody can e_____ without air or water.

82、Clouds are masses of very small drops of water that ______ (漂浮) in the sky.

83、Smoking is h_______ to people’s health.

84、The patient is ______ (稍微地) better today.

85、His house is ________ (包围、环绕) by a big tree.

86、The building was built ______  _____  ___ (为了纪念) that educator.

87、The little girl likes to _____  ______ (打扮、装扮) in her mother’s clothes.

88、I waited for a long time, but he didn’t ______  _____. (出现)

89、It’s bad manners to ______  _______(说谎).

90、Perhaps with a discount and a new sign he could _____  ____ (赢回)his customers.

91、_____  _____  _______ (说实话), I don’t think we have a chance of winning.

92、He met Tom in the street ____  ______ (意外地)yesterday.

93、----- I’m too nervous.

------______  ______. (振作起来) I’m sure you’ll make it.

94、Tom, _____  ______(而不是)his two younger sisters, was to be punished for the wrong decision.

选择题