A:装置的缓冲效果与两弹簧的劲度系数有关
B:垫片向右移动稳定后,两弹簧产生的弹力之比F1:F2=k1:k2
C:势片向右移动稳定后,两弹簧的长度之比l1:l2=k2:k1
D:垫片向右移动稳定后,两弹簧的压缩量之比x1:x2=k2:k1
Sunday 1 the favorite day for our family. My parents 2 not 3 work. My sister and I 4 go to school. We 5 at home and 6 in the morning. In the afternoon, my sister and I 7 out to buy some different things. My sister likes songs. She 8 new tapes. I buy story books, a frisky, a kite and things 9 that. We also buy some small gifts (礼物) for our parents. We 10 them. They love us very much. We live in a happy family.
“故”共____画,第2画是____,组词____。
“思”共____画,第5画是____,偏旁是____。
“光”共____画,第3画是____,偏旁是____。
“乡”共____画,第2画是____,组词____。