简述瓦格纳定律。

Reading comprehension.

                                                     Ten Top Tips for Your Travels

◆ Put on your most comfortable clothes and shoes when you are going for a long journey.

◆ It may be boring to travel on trains or buses, so take a good book or some interesting magazines with you.

◆ If you're going to somewhere hot, you'd better take your sun block (防晒霜) and sunglasses with you, or

     it may hurt your skin.

◆ If you're going to somewhere cold, you'd better take your warm clothes with you, or you may catch a cold. ◆ Take a camera with you so that you can take some pictures to record those special moments.

◆ Be careful with your things whenever you go to busy places, like a train station or a bus stop. There are

     often thieves there!

◆ There are some souvenirs (纪念品) in most places of interest. Leave room in your bag for them.

◆ There are some things at a discount (打折的) for students in most countries, so if you have one, take your

     student card with you in order to save your money.

◆ Bus tours often stop at expensive shops along the way. You'd better not buy souvenirs there. Instead, you

     can buy them in local shops at a lower price.

◆ Remember to take your passport with you if you travel abroad. Whatever you do, don't lose it! Most

     importantly, always remember to have fun-that's what holidays are for!

Answer the following questions.

1. What is a good way to keep away from being bored while you are on a train or a bus tour?

2. What should you take with you if you go to Hainan Island for a trip during your summer holidays?

3. Why must you always pay attention to your things when you are at some busy places?

4. According to the passage, if you are a student and want to buy some souvenirs at a discount when you are

    traveling, what should you show to the shop assistants?

5. What is the most important thing for your holidays?

在如图所示的四位科学家中，以其名字命名功单位的是[ ]

 A． 瓦特

B． 焦耳

C． 牛顿

D． 帕斯卡

秦岭、淮河一线是我国一条重要的地理分界线，下列界限与它大致吻合（）

A.暖温带与中温带的界限

B.0℃等温线

C.800毫米年等降水量线

D.一年一熟和一年两熟制的界限

古汉语形容“多”或“少”时常用“三”字表示，表示“少”的意义的成语是（）

A、三心二意

B、三令五申

C、三言两语

D、三番五次

在2011年1月版《常见维修保养项目工时表》里，更换丘比特曲轴前油封需要（）个标准工时（单位：小时）？

A.1.5

B.1.6

C.1.7

D.1.8