一列简谐横波沿x轴传播，t=0时的波形如图所示，质点A与质点B相距1m，A点速度沿y轴正方向；t=0.02s时，质点A第一次到达正向最大位移处，由此可知（　　）

A．此波沿x轴负方向传播

B．此波的传播速度为25m/s

C．从t=0时起，经过0.04s，质点A沿波传播方向迁移了1m

D．在t=0.04s时，质点B处在平衡位置，速度沿y轴正方向

The little town has grown into a modern big city since 1978 and is _____ what it used to be.

A more than twice as big as     B twice more than as big as

C more than twice big than      D twice more than big than