读某农业生态园生态链循环模式图，完成下列各题。

如图所示，虚线PQ、MN间存在水平匀强电场，一带电粒子质量为m=2.0×10^﹣11kg、电荷量为q=+1.0×10^﹣5C，从a点由静止开始经电压为U=100V的电场加速后，垂直于匀强电场进入匀强电场中，从虚线MN的某点b（图中未画出）离开匀强电场时速度与电场方向成30°角．已知PQ、MN间距为20cm，带电粒子的重力忽略不计．求：

    Rose usually wakes up early in the morning. She always has her breakfast at half past six. She leaves home at about seven o’clock.. She is never late for school.
    She has many classes in the morning. At about twelve fifteen, she comes back for lunch. In the afternoon, she isn’t so busy. After school she   does her homework and plays with other children.
    In the evening, her parents come back from the factory. The family has supper together. After that, they usually read newspaper or listen to the radio for a little time. Sometimes, they watch TV. Rose goes to bed at half past nine. But her father often works late at night.

    It was the afternoon when we closed on our new house, and I was in the garage (车库). I 1 a part of blanket sticking out of the ceiling; that was 2 I pulled on it, and a way to the attic (阁楼) suddenly3 I climbed a ladder and headed up.

    I climbed into a space 4 the garage that was separated from the rest of the attic. As my eyes adjusted (适应) to the dark, I saw a metal container that I 5as a World War II ammo (弹药) box; my grandfather used to store 6used on his farm in this ammo boxes. I opened the cover and was 7 at what I saw: a lot of money 8 up in orange rope. God, I've found, like $800!

    But there was more than one box of9 I found another seven boxes10to the edge, plus two big black dustbin bags full of money.11 about $45,000. In my attic, I won't lie, my first 12 was that this was a 13 from God—the money to 14 this old house and to make life15for our two young sons. But I 16 that the right thing I should do was to17the money to the former owners. So I called them and asked them to come.

    They were18 of course, not only about the money but that I was returning it. They had recently 19 over the house and said it must have been their dad who had20 the money.