Mr Smith， together with his children， ____arrived.
A．are
B．has
C．is
D．have
答案：B
风湿热最常见的皮肤损害是
A．环形红斑
B．结节性红斑
C．蝶形红斑
D．多形红斑
E．圆形红斑
化油器内喉管的功用是限制进气量。（）
