题目内容
在绝缘良好的干燥环境中，人体的安全电压是（ ）
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在潮湿环境和能导电的厂房，安全电压为36V。
保护接地和保护接零作用相同，可以混用。
_____1.You know that we always want you to try your best, but don't let the pressure of grades upset you._____2.A healthy body and a healthy mind are the most important things you will ever have in your life._____3. Be brave and confident. Try new and different things._____4.You are going to enter the next part of your journey inh life.____5.It is in college that you will really find out what learning is about._____6.Of course, you should also take care to select courses that will helpyou develop your interest and improve yourintellectualability._____7. When you leave for college, it becomes absolutely clear to usthat you are not a child any more.____8.Don't let themanynew experiences take away yourinnocence, health, or the desire to knowabout things.____9. In college, you have the mostopportunitiesto change and pay the lowest cost for making mistakes.____10.Just acceptit as a challenge. Find a way to make it your own interest.
The whole passage mainly focuses on ______.
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