题干

二次函数y=-2(x-1)2+3的图象的顶点坐标是()

A:(1,3)

B:(-1,3)

C:(1,-3)

D:(-1,-3)

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答案(点此获取答案解析)

A

同类题1

阅读理解C

    The Lantern Festival falls on the 15th of the first month of lunar calendar(阴历). This day is always the first full moon in the new year. Ancient people also called it Shangyuan Festival. Celebrations and traditions on this day began from Han Dynasty(朝代)and became popular in the Tang Dynasty.

    Watching the red lanterns is one of the main traditions. Lanterns of different shapes and sizes are usually put on trees, or along river banks on show. It is said that sky lanterns were first used by Zhuge Kongming to ask for help when he was in trouble. Today, when the lanterns slowly rise into the air, people make wishes.

    Another tradition is guessing lantern riddles(字谜). The riddles are usually short, wise, and sometimes humorous. The answer to a riddle can be a Chinese character(汉字), a famous person's name, or a place name.

    The most important thing is to eat sweet dumplings with different tastes. In northern China, they are called yuanxiao while in southern part of China they're named tangyuan. Because making sweet dumplings is like a game or an activity, they are usually done happily by a group of friends or family members.

    In old times. The Lantern Festival was also romantic. Watching lanterns gave young people a chance to meet each other. A line from 辛弃疾 , a poet during the Song Dynasty, shows this:

    Hundreds and thousands of times I searched for her in the crowd. Suddenly I turned, and there she stood, in the dim(昏暗的)light.

同类题5

任务型阅读

    Getting your children to study can be a little like getting them to eat their vegetables. ____ Make a study time and have it at the same time every day. This will help your kids to learn to schedule their day and will give them a sense of control over how they spend their time.

    Allow them to study in blocks of time,such as for half an hour with a five-minute break in the middle. ____ Ideal(理想的) study times are after dinner or right after school before dinner.

    Never allow your children to study in front of the television,as that will encourage passive activity. ____ You'll also need to help your kids find the right place to study. After you've set up a good study time for little learners,set up a good place where they can get those creative juices flowing. ____ Make sure there is a table or a desk and a comfortable chair.

    ____ This includes helping them out with their homework sometimes and being there for them with the answers to any questions. The input you give your children during study periods will help form a bond and help make studying enjoyable.

A.Pick a place where your children can study properly.B.Hold them to the schedule they create for themselves.

C.Finally,spend time with your kids when they're studying.

D.Keep the atmosphere light and offer lots of encouragement,too.

E.Instead,use TV as a treat or a reward when the homework is completed.

F.Try to stop this bad habit by offering some sort of reward.

G.One of the best ways to form good study habits for your kids is to design a schedule that they keep to.