电缆固定时，垂直布置的电力电缆在桥架上一般每隔（）mm加以固定绑扎。
A.800
B.1000
C.1500
D.2000
参考答案：D
—Where is my music disc? I can’t see it!
—You’d better________ the disk carefully in your bedroom.
A．look up
B．look for
C．look after
D．look through
