人体细胞中的染色体分为两类，一类是与性别决定无关的染色体，叫____染色体；另一类是决定性别的染色体，叫性染色体．男性的一对性染色体中，一条是X染色体，另一条是____染色体，这两条染色体在形态和大小上都有区别．

信息转述及询问

已知正比例函数y=kx经过点A，点A在第四象限，过点A作AH⊥x轴，垂足为点H，点A的横坐标为3，且△AOH的面积为3．

（1）求正比例函数的解析式；

（2）在x轴上能否找到一点P，使△AOP的面积为5？若存在，求点P的坐标；若不存在，请说明理由．

用所给动词的正确形式填空。
①My parents want me____ (stay) at home every night because it’s dangerous ou tside.
②—You look so sad today.     —I____ (argue) with my girlfriend last night.
③Lucy, what should I do? I need some money ____  (buy) some presents for my best friend.
④—I found it difficult ____ (get) to sleep in the night.
—You’d better____  (take) some sleeping pills.
⑤Lily is 1.7 meters tall. She is tall enough ____  (reach) the apples on the tree.
⑥Don’t ____ (compare) others with yourself, just ____  (work) hard.
⑦She has to____ (go) to see the doctor.