直线$ax+y-1=0$与直线$2x+3y-2=0$垂直，则实数a的值为（     ）

仿照下面的句子，再写一个句子，要求句式相同，语意连贯。

山间的清泉，你何必与遥远的大海比浩瀚呢？你自有你的清纯。

路边的小草，你何必与伟岸的大树比挺拔呢？你自有你的执著。

____，____？____。

House of noodles
    We have three size bowls of noodles, small, medium and large. A small bowl of mutton(羊肉) and carrot noodles is RMB 5. A medium bowl of beef and potato noodles is RMB 7. A large bowl of chicken and cabbage noodles is RMB 8.
Welcome to our house.
Lunch special
    We have some great specials. The cabbage, tomatoes and rice lunch special is RMB 3. The beef, carrots and rice lunch special is RMB 5. The dumplings and soup lunch special is RMB 8.
Time: 11:00a.m---2:00p.m
Dessert house
    What kind of dessert would you like? We have two new specials: ⑴ Apple, strawberry and ice cream. ⑵ Banana, orange and ice cream. And what size of dessert would you like? Small, medium or large? And we also have juice and tea.

2012年9月20日，是我国第十个“公民道德宣传日”。宣传日前夕，某校开展了评选表彰“诚实守信”道德模范活动。下列同学的行为符合诚信守则的是 (     )
①小超踢球时不小心把邻居家的玻璃打碎，他主动道歉并作出赔偿
②小新答应帮同学小婷补习功课，无论刮风下雨，他都准时前往
③考试前小光答应“传纸条”给小风，考试时小光果然这样做了
④小英因为睡懒觉而上学迟到，她却告诉老师是因为自行车坏了