碳的含量对钢材性能的影响很大，一般情况下随着含碳量的增高，钢材的塑性和韧性逐渐增高。
参考答案：错
—What do you think of the car, Jack?
— It looks so nice. Besides, it’s not too expensive.
A．However
B．Whatever
C．What’s more
D．What’s worse
