选择正确的答案填在括号里。,w5Y5k-C'G5w1t/L;|3Z
1．我们在什么时候植树？.Y+u*x5D;h/O7B2k9T5u/G/b5K7\,w5Y5k-C'G5w1t/L;|3Z
A．春天 B．秋天 C．夏天,w5Y5k-C'G5w1t/L;|3Z
2．哪一种是“绿色环保型”火车？;Z1z;},D,H0R5K*o'Y2t,w5Y5k-C'G5w1t/L;|3Z
A．蒸汽机 B．内燃机 C．磁悬浮,w5Y5k-C'G5w1t/L;|3Z
3．给棉花姑娘治好病的是谁？*u:@1z.t1g*k*f(P,w5Y5k-C'G5w1t/L;|3Z
A．青蛙 B．七星瓢虫 C．啄木鸟,w5Y5k-C'G5w1t/L;|3Z
4．燕子的尾巴有什么用？1L9x/J0g8[)q*z1X,w5Y5k-C'G5w1t/L;|3Z
A．赶蝇子 B．掌握方向 C．拨水,w5Y5k-C'G5w1t/L;|3Z