缺词填空

More and more families go on a car trip each year. 小题1: H_______, the thought of trouble on the road may prevent you from going out. To avoid(避免) trouble, you need to make a careful小题2:p_______ for your trip.

First of all, choose a proper route for your trip. Consider小题3:w_______ you are going and find several possible routes to it. Traffic and the 小题4: t_______ that you will spend on the road must be considered when you decide one.

Consider your luggage(行李) needs. 小题5: B_______ you begin packing your necessities(必需品), think about how many people will be in your car and how much space they will need in order to 小题6: t_______ comfortably.

Try to avoid busy times. Usually highways are busier on Fridays and Sundays, so going on Tuesday or小题7:T______ will help you to avoid traffic jams. Driving at night is also a great way to miss the traffic and the kids can sleep小题8:d_______ the trip.

小题9: F_______, don’t forget to check your car carefully before leaving so that you can have a 小题10:s_______ trip.

旋涡泵比较经济简便的流量调节方法是（）。

A．回流调节

B．节流调节

C．变速调节

D．切割叶轮调节