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。