高血压性头痛
A．搏动性跳痛B．剧烈头痛伴频繁呕吐C．阵发性电击样面部疼痛D．疼痛于午后加重E．疼痛于晨间加剧且进行性加重
参考答案：A
As a student of Senior Three, he has very little free time __ he can spend developing his own interest.
A．when
B．in which
C．at which
D．that
铁路职业道德是社会主义对铁路提出的（）要求。
