低颅压综合征
参考答案：
低颅压综合征是因为颅内压低于正常（<70mmHO）所致的头痛等表现，头痛特点是平卧时减轻，站立时加重，多于腰穿或隐性脑脊液漏有关。
低钾血症时静脉输液补钾速度一般不超过
A．50mmol/l
B．10mmol/L
C．40mmol/L
D．30mmol/L
E．20mmol/L
—Do you think there are too many new words in this unit ?
—Yes, that’s right. I’ll first. [ ]
A. look it up
B. look up them
C. look them up
D. look for them
