阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。
“USA? Britain? Which country is____(good) to study in?” We often hear such discussion. As China opens its door, it is a dream for many Chinese students to study abroad. They want to learn about the outside world.
It's true that studying abroad can help students develop____(they). Their foreign language skills will____ (improve) and it may be easier to find jobs.
But there are problems____ should be considered. Language is the first. Students must spend a lot of time____ (learn) another language.
Students must also learn____ (live) without parents' care and deal with all kinds of things they didn't have to do before, like looking after themselves. There are ____ (report) about Chinese students abroad running into an ocean of difficulties____ giving up in the end. When they have to take care ____ themselves, it is hard for students to study well.
Finally, studying abroad brings a heavy burden to the family. For most Chinese parents, the cost of studying abroad____ (be) very high. But is it worth it?
匀速行驶．若行驶中受到的摩擦阻力大小不变，则在加速过程中车速为
3时，汽车加速度的大小为
