如图所示，单匝矩形闭合导线框abcd全部处于磁感应强度为B的水平匀强磁场中，线框面积为S，电阻为R。线框绕与cd边重合的竖直固定转轴以角速度 匀速转动，线框中感应电流的峰值I_m=____，感应电流的有效值I=____ .

在反比例函数y=$\frac{k}{x}$（k＜0）的图象上有两点，（﹣1，y₁）， (-$\frac{1}{4}$,y₂)，则y₁﹣y₂的值是（　　）

已知函数 $f(x)=\sqrt{3}\sin 2\omega x-\cos 2\omega x$ （其中ω∈（0，1）），若f（x）的图象经过点 $(\frac{\pi }{6},0)$ ，则f（x）在区间0，π上的单调递增区间为____．

    I am Tony Smith. I am twelve. I am in No.101 Middle School. I'm in Class 2, Grade 7. My good friend is Jim Green. He is an English boy. He is twelve, too. He is in my class. He can speak good Chinese. Jane is in Class 2, too. I think she is a good girl. My Chinese teacher is Mr. Wang. His students like him. He is very cool.

看拼音写词语。