船用VHF电话ITU的最小信道间隔为().
A.50kHz
B.25kHz
C.12.5kHz
D.5kHz
参考答案:B
Don’t bring food to the party. If you ___,I ‘ll take it away.
A. are B. do C. will
妊娠合并梅毒治疗原则以下哪项不正确()
A.治疗期间不需禁止性生活
B.用药足量
C.及时治疗
D.疗程规范
E.早期确诊