发情周期
参考答案:
从上一次发情开始到下一次发情开始所间隔的时间称为发情周期。
女性,45岁,皮疹半年,加重伴高热1周,伴活动后轻度的呼吸困难,辅助检查提示:尿蛋白1.0g/L,超声心动检查提示肺动脉高压,患者1日前无明显诱因突发抽搐,10分钟后自行缓解,头颅CT检查未见异常表现。
为进一步明确诊断,首选的化验是()
A.脑脊液及血清中自身抗体检测
B.胸片
C.冠状动脉造影
D.血常规检查
E.心肌显像
I wonder why Jack always gets good marks when he does only ________ the others.
A.half as much as
B.as much as half
C.half as many as
D.as many as half