【判断题】IPv4的IP地址用4个字节来表示,IPv6版本的IP地址使用8个字节来表示。
【简答题】“农产品进口关税配额证明”实行“一证一批”、“一证一关”制。
【单选题】Excess supply occurs when:
A.
. the price is above the equilibrium price.
B.
. the quantity demanded exceeds the quantity supplied.
C.
. the price is below the equilibrium price.
D.
. the quantity demanded exceeds the quantity supplied and when the price is below the equilibrium price.
【判断题】IPv4的网络地址段是4字节,IPv6的网络地址段是6字节。()
【单选题】Which of the following statements is not valid when the market supply curve is vertical?
A.
Market quantity supplied does not change when the price changes.
B.
Supply is perfectly inelastic.
C.
An increase in market demand will increase the equilibrium quantity.
D.
An increase in market demand will increase the equilibrium price.
【判断题】在IPv4中,定义IP地址的长度为4个字节,即32位。()
【单选题】患儿,男,2岁。自幼青紫,发热、咳嗽2天,今晨哭闹后突然出现抽搐入院。体温37.8℃,咽充血,心前区隆起,胸骨左缘闻及心杂音,双肺无干湿哕音,指(趾)端发绀明显,胸部X线检查,肺段凹陷,肺心血影缩小,肺野透亮度增加,呈网状肺纹理“靴形”心。 该患儿可能患的先天性心脏病是