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【多选题】
劳动生产率越高，生产一种物品所需要的劳动时间就越少，凝结在该物品中的劳动量就越小，该物品的价值就越小。相反地，劳动生产率越低，生产一种物品的必要劳动时间就越多，该物品的价值就越大。因此，为了增加单位商品的价值量，我们要尽量降低劳动生产率。这一观点A.
正确理解了劳动生产率和商品价值的关系
B.
混淆了个别劳动生产率和社会劳动生产率的关系
C.
承认了劳动时间是商品价值的衡量标准
D.
否认了商品生产者之间的竞争
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【简答题】The astronauts and their achievements __________ you mentioned stimulate the youth much so that some of them are engaged in astronautics． [A]which [B] that [C] what [D] whom
【单选题】Virtual Private Networks(VPN) are networks deployed on a ( ) network infrastructure.
A.
public
B.
private
C.
local area
D.
wide area
【简答题】 (Virtual Private Network)
【判断题】We will turn off the audio system and dim the cabin light when flying at night. ()
A.
正确
B.
错误
【单选题】The light of this room was _____ dim (昏暗的) for Tom _____ read last night. [ ]
A.
too; to
B.
enough; to
C.
too; not to
D.
so; that
【单选题】Which of the following is true of a VPN (virtual private network)?
A.
A VPN communication is secure even though it is transmitted over the public Internet.
B.
One disadvantage of a VPN is that it does not encrypt messages.
C.
Remote access is difficult in case of a VPN.
D.
It is a physical, private pathway over a public or shared network from the client to the server.
【简答题】S7-200PLC中断优先级按从高到低的顺序是 、 、
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