celebratefestivaltake placelanternhave a good timecarnivalparadefireworksdumplingdecoratered packetsdress up4. Children will get money as New Year’s gift, wrapped up in __________.

celebratefestivaltake placelanternhave a good timecarnivalparadefireworksdumplingdecoratered packetsdress up5. Now, people use __________ to help celebrate weddings and birthdays.

celebratefestivaltake placelanternhave a good timecarnivalparadefireworksdumplingdecoratered packetsdress up6. When does the wedding __________?

celebratefestivaltake placelanternhave a good timecarnivalparadefireworksdumplingdecoratered packetsdress up7. I like the Chinese New Year better than any other __________.

celebratefestivaltake placelanternhave a good timecarnivalparadefireworksdumplingdecoratered packetsdress up8. There is an ice __________ show in Harbin every year in winter.

闭合导线圆线圈在均匀磁场中运动，能使线圈中产生感应电流的是

A. 线圈绕自身直径轴转动，轴与磁场方向平行
B. 线圈绕自身直径轴转动，轴与磁场方向垂直
C. 线圈平面垂直于磁场，沿磁场方向平移
D. 线圈平面平行于磁场，垂直磁场方向平移

如果通过闭合回路所包围面积的磁通量很大，则回路中的感应电动势

A. 一定很大
B. 一定很小
C. 先大后小
D. 无法确定

铜环和木环静止放置，使通过两环面的磁通量随时间的变化率相等。不计自感时，则

A. 铜环中有感应电动势，木环中无感应电动势
B. 铜环中感应电动势大，木环中感应电动势小
C. 铜环中感应电动势小，木环中感应电动势大
D. 两环中感应电动势相等

外形、尺寸都完全相同的铁环和铜环置于磁场中，通过两个环的磁通量随时间的变化率相等，则两个环中

A. 感应电动势不同
B. 感应电动势不同，感应电流相同
C. 感应电动势相同，感应电流不同
D. 感应电动势相同，感应电流相同

楞次定律可表述为闭合回路中感应电流的方向，总是使得它所激发的磁场来______引起感应电流的磁通量的变化。