题干

阅读下面短文,按照句子结构的语法性和上下文连贯的要求,在空格处填入一个适当的词或者括号中词语的正确形式填空,并将答案填写在答题卡上。

    Many people travel during the holiday season but do not make sure that their houses and homes ____ (protect). Crime goes up ____(rapid) during the winter and summer holiday seasons. Here are some things that you should keep in mind when you go on a holiday.

    Always give ____(strange) the feeling that you are at home. Have the snow ____(clean) off your stairs or out of your driveway during the winter season. You might ask someone to park ____ car in your driveway.

Tell your newspaper deliverer that you are not at home. ____(have) a pile of newspapers and other mail on your doorsteps tells people that are not at home, so you could also have a neighbor ____ a relative get your mail every day.

    Fix a timer in some of your rooms ____ turns lights on and ____during different time of the day. Some TVs also comes with a timer that you could set to be turned on during certain time. Have a sensitive light outside your house that ____(keep) thieves away when you are not at home.

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答案(点此获取答案解析)

are protected,rapidly,strangers,cleaned,his/her,Having,or,that/which,off,keeps

同类题5

某校化学实验兴趣小组在“探究卤素单质的氧化性”的系列实验中发现:在足量的稀氯化亚铁溶液中,加入1~2滴溴水,振荡后溶液呈黄色.

(1)提出问题:Fe3+、Br2谁的氧化性更强?

(2)猜想:

①甲同学认为氧化性:Fe3+>Br2,故上述实验现象不是发生化学反应所致.则溶液呈黄色是含____ (填化学式,下同)所致.

②乙同学认为氧化性:Br2>Fe3+,故上述实验现象是发生化学反应所致,则溶液呈黄色是含____ 所致.

(3)设计实验并验证:

丙同学为验证乙同学的观点,选用下列某些试剂设计出两种方案进行实验,并通过观察实验现象,证明了乙同学的观点确实是正确的.供选用的试剂:

a.酚酞试液    b.四氯化碳       c.无水酒精       d.硫氰化钾溶液

请你在下列表格中写出丙同学选用的试剂及实验中观察到的现象.(试剂填序号)


选用试剂

实     验     现     象

方案1

____ 

____ 

方案2

____ 

____ 

(4)应用与拓展:

①在足量的稀氯化亚铁溶液中,加入1~2滴溴水,溶液呈黄色所发生的离子反应方程式为____ .

②在100mL FeBr2溶液中通入2.24LCl2(标准状况),溶液中有1/3的Br被氧化成单质Br2,则原FeBr2溶液中FeBr2的物质的量浓度为____ .

③若选用淀粉﹣碘化钾溶液验证上述猜想,是否可行?____ (填“是”或“否”),理由是 ____ .