问题 选择题

下表为家庭中一些常见物质的pH:

物质食醋牙膏食盐水肥皂水火碱溶液
pH3971013
蚊虫叮咬人时,会向人体内注入蚁酸(具有酸的性质),使皮肤红肿、疼痛,要消除这种症状,应在叮咬处涂抹下列物质中的(  )

A.牙膏或肥皂水

B.食盐水

C.火碱溶液

D.食醋

答案

A、牙膏或肥皂水的pH大于7,显碱性,可以涂抹,故选项正确.

B、食盐水的pH等于7,显中性,涂抹无效果,故选项错误.

C、火碱溶液的pH大于7,显碱性,但火碱溶液具有强烈的腐蚀性,不能涂抹,故选项错误.

D、食醋的pH小于7,显酸性,不能涂抹,故选项错误.

故选A.

选择题
阅读理解

Every day we are adding more and more vacation ideas,destinations,tours, and articles.As you explore our website,you will find there is an ever-growing collection of things that will help make your vacation easier and more affordable.

We change our featured destinations very frequently so be sure to keep coming back to see what new ideas we have for your family vacation.We feature a different state,park, and city destination on the front page of the website.These change frequently, so be sure to sign up for our newsletter so you can be sure to keep up with all the new information.

Another great feature we are offering is Guest Articles.These may come from a travel professional,author, parent or child about their travel ideas or offers.These informative articles are great to read and are perfect for discovering valuable tips and tricks for malting travel less stressful.Plus,in many articles you will discover some hidden gems(珍品)that you probably miss if you did not know about them.

One of the best things about our website is our ability to get you discounted Tours and Attraction Passes to the places you want to go most.This is a fantastic way to plan ahead and have your tours and passes paid for and pick them up before you leave your home.Now that is a helpful way to go.These programs can save you over 50%of what you could expect to pay when you arrive.And,we are adding new tours and programs every week.Be sure to check it out.

You can be sure we are working hard for you so that you can relax on your vacation. Let us do all the leg work for you so you can simply enjoy your family vacation!

小题1:What does the writer want to do by writing this text?

A.To give people tips on family vacations.

B.To offer travelers featured destinations.

C.To attract readers to surf a tourist website.

D.To introduce hidden gems for traveling.小题2:Why does the writer suggest surfing the website-frequemly?

A.Because the featured destinations are changeable.

B.Because the front page is quite unique

C.Because it can attract more advertisements.

D.Because it helps to sell more newsletters.小题3:What can we learn from Guest Articles?

A.steps to sign up for the family vacation website.

B.Tips on kecping up with new travel infonmation.

C.Tips and tricks for a comfortable trip.

D.Tricks for enjoying a free family vacation.小题4:Which isn’t the benefit that the website brings to us?

A.We can get discounted Tours and Attraction Passes

B.We can get some information of new tours and programs

C.We can have our Passes in hand when starting off.

D.We can enjoy a family vacation with leg work.小题5:Which of the following shows the organization of the text?(P=Paragraph)