【单选题】在COPD的诊断、严重程度评价、疾病进展、预后及治疗中,有重要意义的检查是
【简答题】相传黄帝时开始使用棺椁,将遗体深埋。周代棺椁制度有严格的等级,( )的棺椁有七重,( )的棺椁有五重, ( )的棺椁有三重,士再重。
【判断题】因为逻辑表达式 成立,所以 成立。( )
【单选题】已知直线a、b、c及平面α,β下列命题中正确的是 ( )
【判断题】可将食物储藏在实验室的冰箱或冷柜内。()
【单选题】Speech act theory did not come into being until
A.
the late 50's of the 20th century.
B.
the early 1950's of the 20th century.
C.
the late 1960's of the 20th century.
D.
the early 21st century.