驾驶大型机动车在高速公路以每小时90 公里速度行驶时，跟车安全距离为90 米以上。
参考答案：对
用get短语的适当形式完成句子。
1.To my surprise, the baby wolf ____ the dogs and then managed to survive.
2. She never arrives on time at the office, but she somehow managed to ___ it.
3. Well, stop chatting. It' s time we _____ some serious work.
4. The news was a terrible blow to her, but she will_____ the shock soon.
阻抗的大小决定于电路（）和（）。
