大叶性肺炎病人入院时应
A．安置在危重病房B．安置在普通病房C．安置在隔离病房D．安置在治疗室E．安置在处置室
参考答案：B
John Lennon and Paul _______ the main songwriters of the Beatles in 1960s. [ ]
A. are
B. is
C. was
D. were
包含金星的天体系统有（）
A.一个
B.二个
C.三个
D.四个
