把大肠杆菌接种于含有营养培养液的试管中培养12h小时以后观察试管发现液体十分清亮,说明该细菌已经被扩增培养成功。
A. 对
B. 错
菌落的特征是鉴别细菌的重要依据之一。
A. 对
B. 错
Applications for the scholarship will be considered ________ they are submitted by the end of May.
A. only if
B. if only
C. if not
D. what if
Women CEOs seem more capable of handling personal relationships _______ their male counterparts.
A. on the other hand
B. whereas
C. compared with
D. in contrast