若直线ax+2y+a﹣1=0与直线2x+3y﹣4=0垂直,则a的值为( )
A:3
B:-3
C:43
D:-43
小江的语文成绩经常不及格,但他对绘画很有兴趣,也有天分,于是他就在绘画方面发展自己。经过努力,他的作品获得了国内比赛大奖。他的成功之路给我们的启示是( )
During holidays,Kitty usually goes to see the exhibits in many museums,such as the history museum,the art museum,the museum of science and technology and the museum of natural history.There are thousands of wonderful things in museum.There are paintings,sculptures(雕塑),costumes(服饰),swords(剑),ancient animal bones and plants,stuffed animals(动物标本)and many others.It is always a good review of history to visit those museums.It is also a great way to learn more things by myself.
聪明的徐文长
徐文长小的时候很聪明。
有一天,他伯父笑着拿出一包礼物,挂在比徐文长高出许多的扁担上,对徐文长说:“这礼物是给你的,但是,你不能把扁担横下来,也不能站在高处去拿。”
徐文长眼珠一转,就有主意了。他把扁担举到一口井边,然后把扁担从井口伸下去,轻而易举地从扁担上取下了礼物。
“真是个聪明的孩子。”伯父竖起了大拇指。