在半固体培养基的穿刺线生长呈模糊或根须状,并使培养基变混浊的细菌的特点是()
A.动力试验阴性
B.生长旺盛
C.无鞭毛
D.动力试验阳性
E.有杂菌存在
参考答案:D
某化工园区的储存区可能存放汽油、煤油和石油气等危险物品,其中汽油、煤油、石油气的储存临界量分别为20t、100t、10t。下列储存方案,不能构成重大危险源的是()。
A.存放60t煤油
B.存放20t石油气
C.存放10t汽油和5t石油气
D.存放10t汽油和60t煤油
Questions 23-29
lfa man loses the ability to recognize his left side, ______.
A.he can still feel the doctor’s touch there
B.he loses his sense of touch on the right side
C.he cannot locate the doctor’s touch on his left side