问题
单项选择题
四显示自动闭塞区段发车进路色灯信号机显示（），表示该信号机列车运行前方至少有一架信号机经道岔直向位置在开放状态。
A、一个绿色灯光
B、一个黄色灯光
C、两个绿色灯光
D、一个绿色灯光和一个黄色灯光
答案
参考答案：D
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四显示自动闭塞区段发车进路色灯信号机显示（），表示该信号机列车运行前方至少有一架信号机经道岔直向位置在开放状态。
A、一个绿色灯光
B、一个黄色灯光
C、两个绿色灯光
D、一个绿色灯光和一个黄色灯光
参考答案：D
Grades aren’t everything, but if you or your parents are worried about your report cards, try some of these easy tips. 小题1:____________________Find out how much time you need to spend on each subject every week, and figure out from your teachers when the homework is due, and then make a schedule. According to the schedule, you are able to make a study pan. 小题2:_________________.Most teachers base grades on homework, and it’s easier to keep up with your assignments(作业) than it is to dig yourself out of a hole. 小题3:_________________Your teachers may have suggestions about what you can do to learn more and improve what you can’t. But you have to ask! 小题4:___________________When you get a bad grade, you probably get angry and sad. That’s normal, but you should also use the experience to try to figure out what went wrong so you can avoid the same mistake in the future. Study with your friends. Sometimes it’s hard to get started on homework, so you may meet with one or two friends to do your work. But this won’t work if you and your friends decide to watch TV or play video games instead of doing your homework!
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