63个动物纲有多少纲出现于水圈()。
A.30
B.40
C.50
D.60
参考答案:D
女性,38岁,常有胸前区隐痛,头颈部搏动感,着急时常有眩晕发作,心脏闻及病理性杂音,收缩压升高,舒张压降低,脉压增宽,拟诊为主动脉瓣关闭不全。
如欲明确诊断,下列哪项病史最重要()
A.高血压史
B.癫痫发作史
C.外伤史
D.家族史
E.风湿活动史
Could you please tell me_?
A. why does the earth go around the sun
B. why the earth goes around the sun
C. why the earth went around the sun