如图所示，质子以一定的初速度从边界ab上的A点水平向右射入竖直、狭长的矩形区域a
题型：选择题
问题：
如图所示，质子以一定的初速度
从边界ab上的A点水平向右射入竖直、狭长的矩形区域abcd（不计质子的重力）。当该区域内只加竖直向上的匀强电场时，质子经过
时间从边界cd射出；当该区域内只加水平向里的匀强磁场时，质子经过
时间从边界cd射出，则（ ）
A．
B．
C．
D．、的大小关系与电场、磁场的强度有关
题型：选择题
Note-taking is a skill that can help you do well in all your schoolwork. It can make you confident when you are studying. But unluckily, most students don’t know how to take notes.
If your teacher writes notes on the blackboard, that’s great. You can copy them or write down the most important facts of all in class. Different teachers do things differently. For example, some teachers may focus on(关注) lots of dates and facts in class, but they only write the important ones on the blackboard. Other teachers may not write anything down, but they may repeat them.
Don’t try to write down every word in class, or you might miss some important points. Some students really learn better with the help of these notes.
Don’t be afraid to ask your teacher to repeat what you’re missed. If your teacher speaks too fast and you can’t follow what he is saying, you can ask him after class.
Comparing(对比) your notes with your classmates’ can be good for your learning. It can also help you and your classmates correct some mistakes.
Note-taking also needs organization. Keep notes for each subject in one place, so that you can find everything easily when a test comes.
Good note-taking takes time. If you decide to recopy your notes every evening, you’ll surely have less time to watch TV. But you’ll save time in the coming test.
根据上面短文内容填空。
小题1:Note-taking can help you ________ all your schoolwork and _______ when you are studying.
小题2:Different teachers do things differently. Some of them like to tell their students many dates and facts but they only ______ on the blackboard; others may repeat them instead of _________.
小题3:If you miss some important points or can’t follow your teacher in class, don’t ____ to ask him or just compare your notes with ________.
小题4:Surely,you won’t _________ to watch TV if you decide to _______ every evening.
小题5:This passage mainly tells students ______________________.