对于伤寒杆菌,下列哪项错误()
A.菌体裂解产生内毒素
B.属于肠道杆菌沙门菌属D群
C.革兰染色阴性
D.对一般化学药品不敏感
E.能耐低温
参考答案:D
—Do you like western food?
—No, The food of our country is _____ that of western countries.[ ]
A. rather good than
B. much better than
C. more better than
D. not so good as.
下列符号中,表示2个氧原子的是( )
A.2O
B.O2
C.CO2
D.2O2