山东盐化工建设,早在()年就有人在青岛开办以苦卤为原料的盐化工厂。
A.1917
B.1925
C.1933
D.1955
参考答案:A
You can spend your free time in our library.There is a reading room ________ more than 600 students.
A.seats
B.to be seated
C.seated
D.seating
变压器引线与电缆连接时,电缆及其终端头均不得与变压器外壳()。