重症渗出性多形红斑的病因主要是()
A.单纯疱疹病毒
B.草绿色链球菌
C.鱼虾等食物
D.磺胺等药物
E.疫苗制剂
参考答案:D
—Excuse me. I’d like to book a table for four tonight.
—Sorry, sir, but there is ____ available tonight. You may try another restaurant.
A.no
B.none
C.nothing
D.neither
火锅汤汁中,有害物质()会浓缩。
A.苯并芘
B.亚硫酸盐
C.多环芳烃
D.亚硝酸盐