压力容器操作人员应具备条件是()。
A、有压力容器操作证
B、有熟悉生产流程
C、有排除故障能力
D、有压力容器证
参考答案:A
Jim ______ Jenny every night for the last month since he first met her in London, and they seem to be getting along very well.
A.dated
B.had dated
C.was dating
D.has been dating
祭扫亲人的坟墓是清明节的主要习俗。这种习俗的积极意义在于()
A.懂得珍惜生命
B.培养艰苦奋斗的精神
C.增强环境保护意识
D.增强爱国爱家的意识