乙烯和乙烯醇共聚物（EVAC）最突出的优点是对（）气体的高阻隔性。
A、氧气
B、乙烯
C、二氧化碳
D、氮气
参考答案：A, C, D
The boy wanted to ride his bicycle in the street, but his mother told him ______. [ ]
A. not to do
B. not to
C. not do it
D. do not to
那不勒斯队成立于哪一年？
