在菌落周围出现很窄的草绿色溶血环的细菌可能是()
A.金黄色葡萄球菌
B.甲型链球菌
C.乙型链球菌
D.表皮葡萄球菌
E.腐生葡萄球菌
参考答案:B
The man lost his money. But he _____ about it.[ ]
A. not try to worry
B. tried not to worry
C. don't try to worry
D. tried to not worry
金刚石的()为2.417。
A、折光率
B、韧度
C、耐压度
D、同轴率