已知点$P$在曲线$y=\frac{4}{e^x+1}$上，$\alpha$为曲线在点$P$处的切线的倾斜角，则$\alpha$的取值范围是（　　）

下列说法中不正确的是（  ）

Are You Ready For High School?

    If you can do these things by the time you go to high school, you'll get on well with others in high school.

⑴____

    A little respect(尊重)goes a long way. Don't help yourself to her personal things in the room, and let her know if you plan to treat friends there. If you don't feel like you're being treated fairly, have a talk face to face.

⑵____

    The first meeting with someone really does matter. To make an immediate connection, look a person in the eye and give a firm handshake, keep eye contact while you're chatting and mention the person's name when saying goodbye.

⑶____

    One study found that holding something in can make you feel lonely and sad. So for your health and friendships, write down the secret in a safe place instead of talking about others in public.

⑷____

    If someone did something nice for you--a gift, some help, now's the time to take out your pen! Sending the person a handwritten note card within 48 hours afterward is a sign that you really have it together.

⑸Please give one more suggestion on how to get on well with others. (回答不多于7个单词)

____

育种工作者使用射线处理农作物的种子，再从中选出优质高产的新品种．这种育种方法能够成功，从根本上是因为改变了农作物的（    ）

下列对友谊的认识正确的是（   ）

① 竞争并不必然伤害友谊     ② 要讲江湖义气   

③ 友谊是平等的、双向的     ④ 志趣相投的友谊，更能经得住时间的考验和风雨的洗礼