题型:阅读判断 题类:模拟题 难易度:普通
山东省青岛市即墨区2020年九年级英语学业水平诊断性测试(一模)试卷
Even if you are a good high jumper, you can jump only about seven feet off the ground. You cannot jump any higher because the earth pulls you hard. The pull of the earth is called gravity. You can easily find out the pull of the earth. If you weigh yourself, you will know how much gravity is pulling you.
Since there is gravity, water runs down hill. When you throw a ball into the air, it falls back down. Because of gravity, you do not fall off the earth as it whirls (旋转) around.
Then, can we get away from the earth and go far out into space? Now you can do it, because spaceships have been invented. Then spaceship will go so fast that it can escape the earth's gravity and carry you into space.
Nowadays, computers and the Internet are playing an important part in our life. {#blank#}1{#/blank#} When you use the computers, you usually need to set passwords(密码). But not all the passwords are safe. How can you make your passwords safe? {#blank#}2{#/blank#}
First, use capital(大写) letters in your password. It will be difficult for others to get into your account(账户). It only takes a hacker(黑客) 13 minutes to work out a six- letter password made of small letters. {#blank#}3{#/blank#}
Second, use numbers and symbols in your password. {#blank#}4{#/blank#} Sometimes such passwords are not easy to remember, but they are really safe.
{#blank#}5{#/blank#} If you do so, hackers will guess your passwords easily. You should change your passwords about every 90 days. In that way, hackers won't guess your passwords.
A. Here are some suggestions for you. B. So please don't use computers too often. C. Each person has several passwords in his live. D. It will be much safer than the simple number password. E. Some people even say that they can't live without them. F. Third, never use personal information for your passwords. G. But the same password in capital letters takes a hacker10 hours to work out. |
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