题干

如图所示,两轻质闭合金属圆环,穿挂在一根光滑水平绝缘直杆上,原来处于静止状态.当条形磁铁的N极自右向左插入圆环时,两环的运动情况是(   )

A:同时向左运动,两环间距变大

B:同时向左运动,两环间距变小

C:同时向右运动,两环间距变大

D:同时向右运动,两环间距变小

上一题 下一题 0.0难度 选择题 更新时间:2011-12-31 05:43:40

答案(点此获取答案解析)

B

同类题2

短文填空。用下面方框中单词的适当形式填入短文空格内,使短文 意思正确、通顺。

back bad        express         feel     it     loud  luck     simple     sweet      thank      two    warm

Once upon a time, a young man came across a spring(泉水) of clear water while crossing the desert. The water was very sweet, and he filled his leather container(皮革容器) so that he could bring some____ to his teacher. After a four-day journey, he presented the water to his teacher.

The old man took a deep drink, smiled____ and thanked his

student very much for the sweet water. The young man returned to his village with a happy heart. After a while, the teacher let a____ student taste the water. He spat (吐) it out, saying it was terrible. It was clear that the water had become no longer fresh sweet because of the old leather container. The student questioned his teacher, “Master, the water tasted strange. Why did you still like it?” The teacher replied, “You____ tasted the water while I tasted the gift. The water was the container for an act of love and kindness and nothing could be ____ .”

After reading the story, we can understand that when we receive a chocolate as a gift from a child, we get more than the chocolate

____ . What we should do properly is to express ____ naturally to him or her because we love the idea within the gift.

Gratitude (感谢) doesn’t always come  naturally.____ , most children and many grown-ups like only the thing given rather than the ____ shown in it. We should remind ourselves and teach our children about the beauty of feelings and____ of gratitude. After all, gifts from the heart are really gifts of the heart.


同类题3

完形填空。阅读下面短文,从短文后各题所给的四个选项(A、B、C和D)中,选出可以填入空白处的最佳选项。

    Virak Mao moved from Cambodia six and a half years ago. He was an exciting and 1 12-year-old boy,looking forward to his new life in Canada but fearful he wouldn't make friends, 2 since he didn't speak English. What great progress he has 3 since then.

    First of all, he got over those early difficulties and 4 friends. Mao not only mastered 5 but won the Grade 9 French award. At school, he 6 to organize school events. Mao also 7 at school, such as cleaning the library and helping others . Mao had wanted to be an engineer 8 after struggling with chemistry, he discovered a new passion for 9. At his Buddhist temple, Mao is a leader and 10 those who came to Canada for the first time to work hard. He also 11 in cultural dancing with other temple members, donating any 12 they raise back to the temple to buy supplies for the poor. Since the summer of 2011, he has held a job at a clothing store to help 13 his family. In June, Mao 14 from C.W. Jefferys and is now in the business management program at Ryerson University.

    He is also the first winner of a new scholarship 15 by the Graduate Business Council with the purpose of helping a student, 16 wants to improve his community and in 17 of money. Awarded the scholarship in June, Mao spoke about the 18 of the award. “I was so excited. It was a huge relief for me,” he said, adding he would buy textbooks and school supplies with the award. “I am really 19 they raised this money to award me the scholarship. I just have no words. Anyone who works hard gets well 20.”