She _________ a swimming champion when she was 17. [ ]
A. turned
B. becomes
C. became
答案:C
患者女性,38岁。既往有哮喘史,踏青时突发哮喘。
可用于治疗哮喘的药物有()
A.麻黄碱
B.倍氯米松
C.氨茶碱
D.色甘酸钠
E.肾上腺素
F.异丙肾上腺素
G.去甲肾上腺素
冲压钢脚手架应有防滑措施。