一患者术前合并风心病二尖瓣狭窄，但能正常工作生活，其ASA分级为（）
A.Ⅰ级
B.Ⅱ级
C.Ⅲ级
D.Ⅳ级
E.Ⅴ级
参考答案：B
82与15的差乘18，积是多少？
According to the newly-made traffic regulation, whoever drives through red light ________ be fined
at least 200 dollars. [ ]
A. shall
B. may
C. would
D. should
