异羟肟酸铁反应的现象是
A．蓝色B．灰色C．绿色D．红色E．黑色
参考答案：D
ZD（J）9系列电动转辙机在使用中应定期进行道岔2mm和4mm的检测，应二个月一次。（）
In front of the temple _____ which came here to be in search of the wanted person .
A．several police cars were
B．were several police cars
C．was several police cars
D．several police cars was
