问题 填空题

读《等高线地形图》,完成下列单项选择题.

(1)图中地点②的高度是______

A:200米B:250米C:300米D:350米

(2)图中地点③的高度可能是______

A:280米B:300米C:320米D:380米

(3)图中地点④与地点②的相对高度是______

A:200米B:250米C:300米D:350米

(4)图中②的地形名称是______

A、陡崖B、山脊C、鞍部D、山谷

(5)图中表示山脊的是______

A、①、B ②、C ③D、④

答案

(1)结合图示得知:②的高度应该是300米(在同一等高线上的海拔高度相等);

(2)图中地点③的高度可能320米左右;根据等高距是50米估算;

(3)地点④与地点②的相对高度是两地的海拔差,即500米-300米=200米;

(4)②的地形名称是山谷(等高线向海拔高处凸为山谷);

(5)山脊是等高线向海拔低处凸出,结合图示得知:C为山脊.

故答案为:(1)C;(2)C;(3)A;(4)D;(5)C.

单项选择题
阅读理解

Password (密码) strength has been a topic about the Internet lately. I have seen lots of clever methods for generating and remembering strong passwords. Some are better than others, but in my opinion, none are adequate. Here's the problem: It doesn't matter how strong your passwords are if you use the same one on multiple sites. All it takes is for a site to get hacked(侵入), like Gawker media, or even Sony did, and now your super­strong password has been stolen, and every site on which you used that password has been accessed.

So, the bottom line is that no matter how strong your passwords are, and no matter what clever tricks you use to help you remember them, if you surf internet often, the only truly secure password system is what you need.

Enter LastPass. It's not the only password manager out there, but I like it the best. You create ONE strong password that you have to memorize and use it to access your LastPass database. The LastPass database is stored online, on LastPass's servers. LastPass recognizes the site you're on and automatically logs you in (after, optionally, asking you to re­enter your master password). LastPass also has automatic form fill and automatic password generation. This means that you can have a different, unique, very strong password for every site you log into, but you only have to remember one master password. It's the best of both worlds.

One argument against LastPass is that if their database is attacked, then all of your sites are in danger, and that's true, but given that their entire line of work is keeping that information safe, I'm willing to take that chance. The alternative is rolling dice(掷骰子) or picking phrases to create passwords, writing all of them down on a piece of paper or something, and then having to manually type them in when I go to a site. A terrible mess.

There is a free version of LastPass, with some additional features unlocked if you pay a $12 a year subscription.

­Joshua Bardwell 

小题1:The writer thinks using the same password everywhere is ________.

A.dangerous

B.convenient

C.appropriate

D.adequate小题2:When using Lastpass, users have to remember ________.

A.all passwords used

B.the last password

C.unique password each time

D.the master password only小题3:Critics are against Lastpass because ________.

A.they have better ways to create password

B.they think rolling dice is more convenient

C.they have no faith in Lastpass database's safety

D.Gawker media and Lastpass were hacked once小题4:Joshua Bardwell writes the passage to ________.

A.share his experience

B.introduce a product of good quality

C.advertise his product

D.teach how to use a new product