Why do you object to ________ the direction？A. followingB. followC. have followedD. ha

an object, but it is not really fixed at all. If you could take a one pound packet of butter 4,000 miles out from the earth, it would weigh only a quarter of a pound.

Why would things weigh only a quarter as much as they do at the surface of the earth if we took them 4,000 miles out into space？ The reason is this: All objects have a natural attraction for all other objects; this is called gravitational attraction, but this power of attraction between two objects gets weaker as they get farther apart. When the butter was at the surface of the earth, it was 4,000 miles from the center (in other words the radius[半径] of the earth is 4,000 miles). When we took the butter 4,000 miles out, it was 8,000 miles from the center, which is twice the distance.

If you double the distance between two objects, their gravitational attraction decreases (减少) two times two. If you treble (成三倍) the distance, it gets nine times weaker (three times three). If you take it four times as far away, it gets sixteen times weaker (four times four ) and so on.

The best title for this passage is______.

A．The Earth Weight

B．Weight in Space

C．Changing Weight on the Earth

D．Weight on and off the Earth

r.

A、had learnt

B、will learn

C、have learnt

D、can learn

A.in

B.of

C.on

D.to

A.that

B.for my staying

C.to that I shall stay

D.to my staying

Which of the following italicized parts is used as an object？

A．What do you think has happened to her？

B．Who do you think the visiting professor is？

C．How much do you think he earns every month？

D．How quickly would you say he would come？

A.

B.

C.

D.

erialized, you have to update the database with the name of the object and location of that file.You elect to employ the OnSerialized attribute to achieve this objective.You now need to apply the OnSerialized attribute to a certain method.What should you do？（）

A.

B.

C.

D.

What do you think hell tell them about you？ The italicized part is______of the sentence.

A．the subject

B．the adverbial

C．the object

D．the complement

m‘s administrators.The application that you created logs all modifications made to physical hard drives on an hourly basis.You now need to create an EventQuery object for this application.What should you do？（）

A.

B.

C.

D.