我国穆斯林最隆重的宗教节日是（）。
A.开斋节
B.宰牲节
C.圣诞节
D.圣纪节
参考答案：B
There was a terrible noise _____ the sudden burst of light. [ ]
A. following
B. to be followed
C. followed
D. being followed
酸雨是指pH于多少的降雨（）。
A.7.0
B.6.6
C.6.0
D.5.6
E.5.0
