问题
单项选择题
地面内暗装金属线槽布线，同一路径无防干扰要求的线路可敷设于同一线槽内。线槽内电线或电缆的总截面(包括外护层)不应超过线槽内截面的( )。
A．30%
B．40%
C．50%
D．60%
答案
参考答案：B
搜题请搜索小程序“爱下问搜题”
地面内暗装金属线槽布线，同一路径无防干扰要求的线路可敷设于同一线槽内。线槽内电线或电缆的总截面(包括外护层)不应超过线槽内截面的( )。
A．30%
B．40%
C．50%
D．60%
参考答案：B
| 阅读理解。 | |||
| |||
| 1.How many soccer cards does Joey have? | |||
| A.Twenty. B.Twenty-three. C.Twenty-five. D.Twenty-seven. | |||
| 2.Who likes volleyball? | |||
| A.Joey Wilson. B.Susie and h  er father.C.Mario and Joey. D.Susie and Mario. | |||
| 3.What doesn't Susie like? | |||
| A.Computer games. B.Tennis. C.Soccer. D.Volleyball. | |||
| 4.What does Mario sometimes do with his father? | |||
| A.Play volleyball. B.Watch volleyball games. C.Buy volleyballs from the Chinese team. D.Go to the volleyball club. | |||
| 5.When does Susie play sports? | |||
| A.On weekends. B.Every morning. C.Every day after school. D.Every Friday. |