Traveling is very interesting. Many people love traveling. There are many ways to travel: by plane, by train, by ship or by car. Everyone has their favorite way.

    Greg: My favorite way of traveling is by car. I can bring my pet dog along. I can travel three hundred miles or only fifty miles a day. I can stop at a good restaurant to enjoy a good meal or at a hotel to spend the night.

    Eliza: I love traveling by train best! It's very exciting. I traveled most of Europe in 5 months by train. It's the best way to talk with the local (当地的) people and make new friends on the way. Trains make even the longest trip enjoyable. The train ride to me is just like a big moving party.

    I also like traveling by ship. It is a very great way to spend a vacation. I can go to parties and movies on the ship, and enjoy the blue sky and water.

    Danny: Planes are my favorite. It's the fastest way of traveling. I can quickly get to another country. Planes have very comfortable seats. I can have something to drink and to eat. I can also read some free magazines and newspapers.

钢材做成“V”形是因为材料的抗弯曲能力与其形状____关。

做人的良知就是（    ）         

“学生罢课半月，政府不管不理，且对待日益严厉；商界罢市不及一日，而北京被捕学生获释；工商界罢工不及五日，而曹汝霖被罢免。从中可以看出五四运动取得胜利的主要原因是（    ）