油气井开发生产所部署的井统称为（）。
A、开发井
B、预探井
C、详探井
D、参数井
参考答案：A
化学发光免疫测定最常用的反应体系为()
A．气相
B．液相
C．固相
D．半固体
E．气溶胶
—Is Bob still teaching?
—I’m afraid not. He is said the school as he has become a businessman.
A．that he has left
B．to leave
C．to have left
D．to be left
