题干

已知下列命题:( )

①关于中心对称的两个图形一定不全等

②关于中心对称的两个图形是全等形

③两个全等的图形一定关于中心对称

其中真命题的个数是

A:1个

B:2个

C:3个

D:0个

上一题 下一题 0.0难度 选择题 更新时间:2017-08-27 04:02:32

答案(点此获取答案解析)

A

同类题2

任务型阅读

    It's important to prepare for rainy days. Similarly, it's important to save money.____Why? It's because they've got used to spending all the money they make. Sometimes, the hardest thing about saving money is just getting started. Here are some tips to help you save money.

    ____The first step in saving money is to know how much you're spending. For one month, keep a record of everything you spend money on. Once you have your data, organize these numbers by category(类别) and get the total amount for each.

    You can make a budget(预算). Now that you have a good idea of how much you spend in a month, what can you do now?____To plan your spending, you can build a budget. In this way, you can limit over-spending and make sure that you put money away for unexpected situations.

    ____Doing so make it much easier to get started. Begin by deciding how long it will take to reach each goal. Some short-term goals include starting a fund to cover 6 months to a year of living costs and saving money for a vacation. Long-term saving goals are often several years or even decades away and can include saving for retirement and putting money away for a child's college education.

    Make saving money easier with automatic transfers (自动转帐). Automatic transfers to your savings account are very helpful.____By moving money out of your checking account, you'll be less likely to spend money you plan to use for savings.

A. You can set savings goals.

B. You can record your costs.

C. You can plan your spending.

D. You can keep a record of what you do.

E. They can make saving money much easier.

F. However, some people find it hard to save money.

G. You can move money out of your savings account.

同类题4

Values join us together and set us apart. Today, our society has a terrible lack(缺乏)of values. Here are some social values that everyone needs.
◆Respect
Respect means to respect(尊重)others in everyday life. Even if you are against a person, it is important to have respect. It is this respect that makes us human. Without this respect, we become  animals. We need to respect our friends for our friendships. We even need to respect our enemies, because they help us to grow up and be stronger. Respect is one of the crucial values in a relationship.
◆Love
Love is everything. With love in our hearts, we feel no need to hurt another. With love in our hearts, we will pay more attention to the similarities in opinions rather than the disagreement. If we want others to be good to us, we need to be good to them. After all, we give love to get love, right?
◆Loyalty
People often forget the meaning and importance of loyalty(忠诚). Loyalty is necessary for people to believe in each other. In no matter what kind of relationship, we need to believe in each other so that we can work together towards the same goal.
◆Honesty
Honesty is to show other people who we really are. Honesty helps us do better, because it makes us realize our problems and find ways to solve them. It is this honesty, that will make others help you out, not because you need it. But, because they have problems too, which you can help out with. This honesty will help us follow the other values in society and, truly, "heal the world"!