如图所示,水平放置的条形磁铁中央,有一闭合金属弹性圆环,条形磁铁中心线与弹性环轴线重合,现将弹性圆环均匀向外扩大,下列说法中正确的是()
A:穿过弹性圆环的磁通量增大
B:从左往右看,弹性圆环中有顺时针方向的感应电流
C:弹性圆环中无感应电流
D:弹性圆环受到的安培力方向沿半径向外
图中弯曲的撑竿表明力能使物体发生 ____;运动员推开撑竿后不会立即落下,由于 ____将继续向前,从而越过横杆.
如图为动物细胞和植物细胞结构示意图.请据图回答:
—Could you play the erhu before?
—
用所给单词完成填空。
had was by were with visited brought cooked young saw
Last weekend , it ____ a sunny day . My mother and I ____ my grandparents . We went there ____ bus . We ____ many things . My grandparents ____ very happy when they____ us . Grandma ____ fish . After lunch , I played____ my cousin . He is one year____ than me . We ____a good time .