一般来说，重油的粘度越大，含碳量越高，含（）量则越少。
A.氢气
B.氧气
C.氮气
参考答案：A
Jack took part in the speech contest and, _______ is more surprising, won the first place. [ ]
A. that
B. what
C. which
D. it
当淋巴结出现肿大和疼痛时，是因为所收纳的范围内存在（）
A.炎症
B.外伤
C.癌症
D.异物
E.畸形
Jack took part in the speech contest and, _______ is more surprising, won the first place. [ ]