车站使用简易紧急制动阀由（）负责保管，交接班时应进行检查。
A.调车区长
B.站长
C.专业人员
D.调车组
参考答案：D
There are four _____ and two _____ in the group.[ ]
A. Japanese ; Germen
B. Japaneses ; Germen
C. Japanese ; German
D. Japanese ; Germans
Eating too much fat can distribute to heart disease and cause high blood pressure.
A．attribute to
B．attend to
C．devote to
D．contribute to
