一带电粒子射入一固定的正点电荷Q的电场中，沿如图所示的虚线由a点经b运动到c，b点离Q最近。若不计重力，则（    ）

    There are____styles in clothing. Some styles are____——they stay popular____a long time and never go____out of fashion. They may be enduring favourites for several ____, or even generations.

    ____other living things, people need nourishment to live. Food____the energy needed for____activities, from____ actions such as breathing and sleeping to more ____activities such as sports.

    We are students from Thailand,and we decide____(save) elephants. The elephant is one of Thailand's____(symbol). Our first flag had a white elephant____it. This is a symbol of luck. Elephants are smart animals. It is easy for them to play soccer____music. They can also draw very____(good). In addition, they are strong enough to carry a lot of things for people. People say that an elephant never____(forget). They can walk for a long time and never get____(lose). They can also remember places with food and water. This helps them to live. But now elephants are in great____(dangerous). People cut down many trees, so elephants are losing their homes. People also kill____(they) for their ivory.Today there are only about 3,000 elephants. It is necessary for us to try our best to save the trees and not to buy things that____(make) of ivory. It is important to remember that March 13th is Thai Elephant Day.