小儿桡骨头半脱位的发病机理由欧阳筱玺提出。

A、空调温度控制系统

B、电冰箱温度控制系统

C、电风扇控制系统

D、微波炉加热时间控制系统

E、汽车自动驾驶系统

有关系代数表达式：与其执行结果等价的pgSQL语句为（ ）。

A、SELECT DISTINCT examinee.eeid,eename,eid FROM eeexam,examinee WHERE examinee.eeid=eeexam.eeid;

B、SELECT DISTINCT examinee.eeid,eename,eid FROM eeexam CROSS JOIN examinee WHERE examinee.eeid=eeexam.eeid;

C、SELECT DISTINCT eeid,eename,eid FROM eeexam NATURAL JOIN examinee;

D、SELECT DISTINCT examinee.eeid,eename,eid FROM eeexam JOIN examinee ON examinee.eeid=eeexam.eeid;

E、SELECT DISTINCT eeid,eename,eid FROM eeexam JOIN examinee USING(eeid);

F、SELECT DISTINCT examinee.eeid,eename,eid FROM eeexam,examinee;

G、SELECT DISTINCT examinee.eeid,eename,eid FROM eeexam CROSS JOIN examinee;

H、SELECT DISTINCT eeid,eename,eid FROM eeexam NATURAL JOIN examinee WHERE examinee.eeid=eeexam.eeid;

I、SELECT DISTINCT examinee.eeid,eename,eid FROM eeexam JOIN examinee WHERE examinee.eeid=eeexam.eeid;

A、风府

B、风门

C、曲池

D、风池

A、一次

B、两次

C、三次

D、四次