设x₀是方程lnx+x=4的解，则x₀属于区间（　　）

任务型阅读

    When you meet someone, you don't know if that person is going to become your good friend. (1) So you have to be a little more careful at first. Do you know what to do?

★Hang out with people you would like to have as friends and join in their plans unless you really disagree.

★If you don' t agree with their plans say so in a positive way, "I like this but maybe we could…”

★Accept（接受）people as they are. You can like other people although you don't agree with everything they say or do.

★You don't have to know about or have an opinion on everything—in fact it is often better if you don't.

★(2) Being a good listener so that others can tell that you ___________________(对……感兴趣) what they are saying.

如图，直线a、b都与直线c相交，给出下列条件：①∠1=∠2；②∠3=∠6；③∠4+∠7=180°；④∠5+∠8=180°．其中能判断a∥b的条件是（　　）

如图（甲）所示，重为80N的物体在大小为10N，水平向左的拉力F₁作用下，沿水平地面以3m/s的速度做匀速直线运动。如图（乙）所示，保持拉力F₁不变，用水平向右的拉力F₂，拉物体匀速向右运动1m。若不计滑轮、绳的质量和轮与轴间的摩擦 ，则