据媒体公布,我国国防科技大学研制的“天河二号”以每秒3386×1013次的浮点运算速度第五次蝉联冠军,已知3386×1013的结果近似为3430000,用科学记数法把近似数3430000表示成a×10n的形式,则n的值是____.
This is my room (房间).I have a new desk and a chair.The book is on the desk.The ruler is under the book.My eraser is in the pencil box.My bag is on the chair.Where's my cat? It's under the chair.It's sleeping (睡觉).
一次函数y1=kx+b与y2=x+a的图象如图,则下列结论:①k<0;②a>0;③当x>2时,y2>y1,其中正确的个数是( )