A：合金丝的横截面积一定时，合金丝越长，其电阻越大
B：合金丝的电阻与该合金丝的横截面积无关
C：合金丝的长度一定时，合金丝的横截面积越小，其电阻越小
D：合金丝的电阻与该合金丝的长度无关
下面句中有一处错误，请找出来并改正。
The horse is as thinner as the cow .
____
Which is the man's favorite pet?
The chief engineer of the high-speed railway ________ Shanghai to Beijing always devotes most of his time ________ his work.
