脊柱后凸多发生于()
A.胸腰段
B.胸段
C.腰段
D.腰骶段
E.骶椎
参考答案:B
I was about to sail away ______ I heard the sound of stamping and singing on the bank,
A.when
B.while
C.as
D.the instant
子痫前期出现剧烈头痛时应首选()
A.硫酸镁
B.催产素
C.麦角新碱
D.度冷丁
E.速尿