构成护患关系基础的是（）。
A.道德关系
B.技术性关系
C.利益关系
D.法律关系
E.文化关系
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
部颁规定变送器的误差率应小于（）。
A.±0.2%
B.±0.3%
C.±0.5%
D.±0.8%
