体现“一个人受过教育的年限和层次”的概念是()。
A.学位
B.学历
C.学力
D.学士
参考答案:B
An inflation life raft is thrown into the water from a sinking vessel, what occurs automatically after the painter trips the C02 bottles to inflate the raft?().
A.The sea anchor deploys
B.The floor inflates
C.If upside down, the craft rights itself
D.The painter detaches from the raft
最高温升压力:按《气瓶安全监察规程》的规定充装,在允许的()工作温度时瓶内介质达到的压力。
A.最高
B.最低