个人独资企业的开业、变更、注销的办理时限是______个工作日内。
A．10
B．15
C．20
D．30
参考答案：B
A moment ________ fear went _________ his mind.
A．of; across
B．of; through
C．for; through
D．with; through
润滑剂的基本作用？
