He placed one of the arrows __ his bow.
A.in
B.on
C.at
D.against
答案:A
in his bow意思是:在他的弓上.
命题“若A⊆B,则A=B”与其逆命题、否命题、逆否命题这四个命题中,真命题有( )
A.0个
B.2个
C.3个
D.4个
湿热酿痰蒙蔽心窍,其病理阶段为()
A.气分
B.血分
C.营分
D.气营
E.气血