促甲状腺肿物质是
A．钙B．磷C．砷D．氟E．硫氰酸盐
参考答案：E
—Meimei is the difficult math problem.
—I'm sure she'll [ ]
A. working on; work it on
B. working on; work it, out
C. working out; work it on
D. working out; work it out
正常成人安静时VA/Q约为（）
A.0.2
B.0.4
C.0.8
D.1.25
E.1.5
