517号频点对应的下行中心频率为()MHz
A.1711
B.1711.2
C.1710.8
D.1806.2
E.1806.2
参考答案:E
I don’t like to ask people for help as a rule but I wonder if you could ______ me a favour.
A.make
B.do
C.find
D.get
治疗急性阿米巴痢疾和阿米巴肝脓肿的首选药物是
A.二氯尼特
B.巴龙霉素
C.甲硝唑
D.二氢依米丁
E.伯氨喹