细菌的菌体抗原常规的制备方法()
A.75%乙醇处理
B.100℃加温2h处理
C.0.85%氯化钠处理
D.1%氯化钙处理
E.2%氯仿处理
参考答案:B
. ______ is to attend our evening.
A.both the singer and the dancer
B.Either the singer or dancers
C.The singer or dancers
D.The singer and dancer
建筑安全技术
土质均匀且地下水位( )基坑(槽)或管沟底面标高时,其挖方边坡可做成直立壁不加支撑。
A.低于
B.2倍于
C.等于
D.3倍于