第1题
A.display:block;
B.display:inline-block;
C.display:none;
D.display:inline;
第3题
A.display:inline;
B.display:none;
C.display:block;
D.visibility:hidden;
第4题
A.display:inline-block;
B.display:block;
C.display:inline;
D.display:none;
第5题
A.visibility:hidden可以隐藏某个元素,但隐藏的元素仍需占用与未隐藏之前一样的空间
B.display:none可以隐藏某个元素,且隐藏的元素会占用空间。也就是说,该元素不但被隐藏了,而且该元素依然会在页面布局中存在
C.visibility:hidden可以隐藏某个元素,且隐藏的元素不会占用任何空间
D.display:none可以隐藏某个元素,但隐藏的元素仍需占用与未隐藏之前一样的空间
第7题
A.visibility:hidden
B.display:none
C.opacity:0
D.position:absolutely;top:-4555px;left:-45545px;
第8题
A.display:inline内联元素只需要必要的宽度,不强制换行
B.display:block块元素是一个元素,占用了全部宽度,在前后都是换行符
C.display:none可以隐藏某个元素
D.display:hidden可以隐藏某个元素
第9题
在交换机SWA上执行 display vlan 2 命令后,交换机输出如下:
display vlan 2
VLAN ID: 2
VLAN Type: static
Route interface: not configured
Description: VLAN 0002
Tagged Ports: none
Untagged Ports:
Ethernet1/0/1 Ethernet1/0/3 Ethernet1/0/4
从以上输出可以判断______。
A. 端口 Ethernet1/0/1是一个Trunk 端口
B. VLAN2 中包含了端口Ethernet1/0/1、Ethernet1/0/3 和 Ethernet1/0/4
C. 带有 VLAN2 标签的数据帧离开端口Ethernet1/0/3 时需要剥离标签
D. 当前交换机存在的 VLAN 只有VLAN2
第10题
A.To display current alarm of device correctly, the device needs to report current alarm to EMS actively. Therefore, necessary configuration for the device to actively report alarms must be correctly set.
B. Protection switching event alarm occurs at the instant when protection group switching happens, so it is not durative alarm. Therefore, after the alarm occurs, it is immediately saved in locking alarm. You can check it only in the locking alarms.
C. If EMS server timezone is different from PTN device timezone, alarm occurrence time on PTN device will be different from that on EMS. Therefore, during commissioning of PTN, you should set PTN timezone to be consistent with EMS timezone, usually local timezone.
D. None of the above