余数必须要比除数____。

—________ did you stay there?

—I stayed there for two hours.

在正点电荷Q产生的电场中。a、b两带电粒子以相等的初速度射入电场，实线为两粒子仅在电场力作用下的运动轨迹，虚线为等势线。则（  ）

    I think 1likes dogs. Dogs are our friends. My friend Tomson likes dogs very2 . He has a big dog. 3name is Bobo. He's bright(聪明的). Every Saturday aftemoon Tomson takes Bobo for a long walk in the street. Sometimes Tomson takes Bobo to the park. Tomson4the frisby and Bobo catches it in the air. Bobo can open the door and close the door. When Tomson goes to school, Bobo stands in5of the door and waits6Tomson coming. When he sees Tomson, he7 the door and catches his bag. What a bright dog!

    I like Bobo. I often go to Tomson's home to play8 him. I often give Bobo  9  to eat. I want to have a dog, too.