回归热治疗首选用药为（）
A.青霉素
B.多西环素
C.四环素
D.氯霉素
E.红霉素
参考答案：C
企业财产保险属于（）。
A.定值保险
B.不定值保险
C.定额保险
D.不定额保险
Many new buildings are being ________ in this area now.
A．put up
B．put up with
C．put on
D．put out
