以下哪一种牙髓炎多发生在年轻人
A．慢性溃疡性牙髓炎
B．慢性增生性牙髓炎
C．牙髓变性
D．慢性闭锁性牙髓炎
E．．牙髓坏死
参考答案：B
Filled with anger, he didn’t shout or swear, but just ________ silently at me.
A．glared
B．saw
C．looked
D．glanced
增大转化炉的鼓风量，可使炉膛负压增大。
