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Passage Two In agrarian( 农业的 ),pre-industrial Europe, "you'd want to wake up early, start working with the sunrise, have a break to have the largest meal, and then you'd go back to work," says Ken Albala, a professor of history at the University of the Pacific, "Later, at 5 or 6, you'd have a smaller supper." This comfortable cycle, in which the rhythms of the day helped shape the rhythms of the meals, gave rise to the custom of the large midday meal, eaten with the extended family, "Meal are the foundation of the family,' says Carole Couniban. a professor at Millersville University in Peensylvania, "so there was a very important interconnection between eating together" and strength-eating family ties. Since industrialization, maintaining such a slow cultural metabolism has been much harder. With the long midday meal shrinking to whatever could be stuffed into a lunch bucket or bought at a food stand. Certainly, there were benefits. Modern techniques for producing and shipping food led to greater variety and quantity, including a tremendous, increase in the amount of animal protein and dairy products available, making us more vigorous than our ancestors. Yet plenty has been lost too, even in cultures that still live to eat. Take Italy. It's no secret that the Mediterranean diet is healthy, but it was also a joy to prepare and cat. Italians, says Counihan, traditionally began the day with a small meal. The big meal came at around 1 p.m. In between the midday meal and a late, smaller dinner came a small snack. Today, when time zones have less and less meaning, there is little tolerance for offices' closing for lunch, and worsening traffic in cities means workers can't make it home and back fast enough anyway. So the formerly small supper after sundown becomes the big meal of the day. the only one at which the family has a chance to get together. "The evening meal carries the full burden that used to be spread over two meals" says Counihan.
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【单选题】在以下微波通信的特点中,错误的是()。
A.
微波通信为视距直线传输
B.
微波通信的频带宽,容量大,质量好
C.
微波通信的传输距离不远
D.
微波通信易受电磁干扰,遇障碍物会反射或阻断
【单选题】以下关于微波通信特点的描述中,错误的是
A.
微波对应的信号波长为3~30m
B.
微波信号一般只能可视传播
C.
微波信号容易实现远距离通信
D.
微波一般采用点对点方式通信
【单选题】单位将购进的货物用于下列项目的,属于增值税视同销售货物行为,应征收增值税的是()
A.
无偿赠送给受灾地区
B.
交际应酬
C.
集体福利
D.
生产增值税应税货物
【判断题】掌握卵孵化盛期到2龄前用药剂是属于化学防治。
A.
正确
B.
错误
【多选题】以下是微波通信的特点是( )。
A.
频带宽,通信容量大
B.
抗干扰性较好、工作较稳定、可靠
C.
中继通信灵活性大
D.
投资少、建设快
【单选题】单位将购进的货物用于下列项目的,属于增值税视同销售货物行为,应征收增值税的是( )
A.
生产增值税应税货物
B.
集体福利
C.
交际应酬
D.
无偿赠送给武汉疫区
【单选题】以下哪点不是微波通信所具有的特点?()
A.
频带宽
B.
通信容量大
C.
传输损伤大
D.
抗干扰能力强
【单选题】以下选项不属于微波通讯特点的是
A.
点到点通信系统
B.
传输两点间无障碍
C.
建设费用高
D.
传输距离远
【简答题】以下关于微波通信特点的描述中,错误的是( )
【判断题】中间商在商品的买卖过程中,对商品一定是拥有所有权的
A.
正确
B.
错误
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