题干

给出以下四个问题:

①解不等式a2x-3>a3x-2(a>0且a≠1).

②求边长为6的正三角形的面积.

③求函数f(x)= 的函数值.

④若集合A={-1,1},B={x|mx=1},且A∪B=A,求m的值.

其中不需要用条件语句来描述其算法的有(   )

A:1个

B:2个

C:3个

D:4个

上一题 下一题 0.0难度 选择题 更新时间:2020-01-03 12:19:48

答案(点此获取答案解析)

A

同类题1

任务型阅读

    When something great happens to a friend, a family member or a classmate, congratulations are in order! However, some people don't know how to congratulate others. Here are some ways to show your congratulations.

Say “congratulations” with a smile. Remember to express your congratulations with a winning smile. The expression on your face is pretty important. If you say “congratulations” with a serious look on your face, the person will probably think you aren't actually all that happy for him or her.

    Send an en email or a card. Besides saying “congratulations in person, you might want to send a congratulatory note. You can send a simple email or write a message on a card. You can buy some beautiful cards in the store.

    Send a gift. If the occasion is special enough, you can send a gift. You don't need to buy something expensive. Try to buy a suitable gift. All in all, choose a gift that lets the person know you want to celebrate with him or her.

    Spread the word. You can help spread the person's joy by telling other people the good news, so they can congratulate the person as well. If the person prefers to keep the good news private, don't spread the word.

Title:  How to ____

Say “congratulations” with a smile.

★ Express your congratulations with a winning smile.

★____ congratulations with a serous look on your face.

Send an en email or a card.

You can send a simple email or ____ on a card.

Send a gift.

You can buy a suitable gift instead of something expensive.

Spread the word.

★You can tell other people the good news.

★You can spread the good news around if the person ____keep it private.