可以使你在本地机上浏览网上信息的软件是（）
A、WORD或WPS
B、INTERNET EXPLORER
C、E-MAIL
D、BBS
参考答案：B
You _____ a teacher. I _____ a student. My sister _____ a student, too. [ ]
A. am; is; are
B. is; are; am
C. are; am; is
D. are; is; is
低汞触媒的含汞量是（）
A、4.5-6
B、5-9
C、3-10
D、6-8
