According to the text, what is “the very essence of the essay”（）
A. The essence of a good essay is that it is proper and respectable
B. The essence of a good essay is that it can move the readers
C. The essence of a good essay is that it should be praised by the teacher
D. The essence of a good essay is that it follows all the rules of a formal composition
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下列表式的值为True的是（）
A. True and False
B. abc’＞’xyz’
C. True or False
D. 3＞2＞2
以下哪一组命令用于完成创建VLAN 20，并将某个端口作为接入端口分配给VLAN 20的过程（）
A. Switch（config）#vlan 20Switch（config）#Interface gig x/ySwitch（config-if）#switchport access vlan 20
B. Switch（config）#Interface gig x/ySwitch（config-if）#vlan 20Switch（config-vlan）#switchport access vlan 20
C. Switch（config）#vlan 20Switch（config）#Interface vlan 20Switch（config-if）#switchport trunk native vlan 20
D. Switch（config）#vlan 20Switch（config）#Interface vlan 20Switch（config-if）#switchport access vlan 20
__ mistakes and weaknesses, it did a great deal of good work inside the trade union（）
A. No matter what
B. Although
C. In spite
Despite
运行下列程序代码，运行结果可以画一个半圆的是（）
A. import turtle
B. turtle.circle（100,180）
C. B．import turtle
D. turtle.circle（180,100）
E. C．import turtle
F. turtle.circle（100,270）
G. D．import turtle
H. turtle.circle（270,100）
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