已知交流电压u=311sin(314t),其有效值为()。
A、220V
B、230V
C、250V
D、380
参考答案:A
根据句子意思和音标、首字母提示写出单词。
小题1:There are twelve m______ in a year.
小题2:Mum always cooks for the family in the k______ after work every day.
小题3:Mike likes playing games on the /kəm'pjuːtə/ ______.
小题4:It’s quiet here and I can /sliːp/______ well every night.
小题5:I want to go to the library to b______ some story books.
患者,男,25岁。外感后未经治疗,自昨日起开始出现高热烦躁,咳嗽胸闷喘息,舌苔黄,脉数。应首选的药物是()
A.栀子、淡豆豉
B.黄连、黄芩
C.石膏、麻黄
D.栀子、黄柏
E.赤芍、牡丹皮