题目内容
（请给出正确答案）
Besides carrying diseases, rats also ______.
A．take men's food
B．live in cities and villages
C．know how to identify poison food
D．all of the above
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更多“Besides carrying diseases, rat…”相关的问题
Mary is a waitress (女服务生). She works at a busy restaurant She lakes people's orders(订单) and serves (供应)them food. She also takes people's money and gives them change(零钱). When the restaurant is really busy. sometimes she even cooks tire food. She works six days a week. Her job is not easy. The trays(盘子) of food are heavy. She always gels backaches from carrying the heavy trays. Besides that. she has to be on her feet(站着)all day. Often her feet get tired. Mary doesn't mainly like her job. but she has to work because she needs the money. She hopes she can find a better job soon.
What dopes Mary do at tile restaurant？
A．She takes people's order and seines them food.
B．She sets and cleans the table.
C．She stands at the gate of the restaurant.
听力原文： Many African mothers carry babies on their back. In this way, a working mother knows that her baby is safe on her back while her hands are free for her work. On the other hand, the baby stays in close contact with his mother and feels safe and warm. However, back-nesting is not suitable in summer. Besides, (29) back-nesting does not give babies freedom and chance to use their hands and legs. Children need to observe and explore the environment. What's more, this sense of security given by back-nesting may be suddenly broken when the child can no longer be carried. He may be put down and expected to behave like a grown-up child. (30) But he has been over protected for so long that now he feels very insecure and many behave like a baby. Once I visited a friend's home, where the mother was carrying her eleven-month-old son on her back. I found the mother had nothing special to do with her hands and the baby was restless. I asked her to put the baby down. At first, (31 ) she didn't want to because she firmly believed that if she carried the baby on her back, he could sleep longer, keep quieter and make less mess. I tried my best to persuade her and finally she gave in. Immediately the child began examining the toy drum before him. He looked much live her and happier.
(30)
A．It is not safe for the children.
B．The children can not communicate with mothers face to face.
C．The mothers may feel very tired.
D．The children have no chance to use hands and legs.
根据材料，回答题。
The Development of American Postal System
In the early days of the United States， postal charges were paid by the recipient and chargesvaried with the distance carried. In 1825， the United States Congress permitted local postmastersto give letters to mail carriers for home delivery， but these carriers received no government salary and their entire compensation depended on what they were paid by the recipients of individual letters. In 1847， the United States Post Office Department adopted the idea of a postage stamp，which of course simplified the payment for postal service but caused grumbling by those who did not like to pi"epay. Besides， the stamp covered only delivery to the post office and did not include carrying it to a private address. In Philadelphia， for example， with a population of 150，000， people still had to go to the post office to get their mail. The confusion and congestion of individual citizens looking for their letters was itself enough to discourage use of the mail. It is no wonder that， during the years of these cumbersome arrangements， private letter-carrying and express businesses developed. Although their activities were only semi-legal， they thrived and actually advertised that between Boston and Philadelphia they Were half-day speedier than the government mail.
The government postal service lost volume to private competition and was not able to handle efficiently even the business it had. Finally， in 1863， Congress provided that the mail carriers who delivered the mail from the post offices to private addresses should receive a government salary，and that there should be no extra charge for that delivery. But this delivery service was at first confined to cities， and free home delivery became a sing of urbanization. In 1890， of the 75 million people in the United States， fewer than 20 million had mail delivered free to their doors. The rest; nearly three quarters of the population， still received no mail unless they went to their post OffiCe.
What is the main idea of the passage？ 查看材料
A.The development of a government postal system.
B.The increasing use of private mail services.
C.The history of postal stamps.
D.The comparison of urban and rural postal services.
A.OSPF与IS-IS使用低优先作为DR/DIS，优先级与强占方式无关
B.OSPF与IS-IS均在DR选举后不发生强占
C.OSPF不强占，但IS-IS强占
D.OSPF与IS-IS使用高优先作为DR/DIS，优先级与强占方式无关
