通信记录装置作用良好的车站，单机、动车、重型轨道车及无运转车长值乘的列车如何发车？

我国人民很早就学会驯养家蚕，编织丝绸．其中有一道工序是将蚕茧用热水浸泡后缫丝，请问：缫丝时，在茧内死亡的是哪一发育阶段的家蚕（　　）

A．卵

B．幼虫

C．蛹

D．成虫

亚洲东部和南部季风气候显著的原因是(    )

A．亚洲中部地势中部高，四周低　

B．亚洲位于亚欧大陆东岸

C．位于世界最大的大陆东部，面临世界上最大的大洋，海陆热力性质差异显著　

D．亚洲的面积是七大洲中面积最大的

阅读理解。

     A good friend of mine was complaining about her son the other day. "Did you notice," she started, "how

he didn't wait for me to get my salad before he dove into his?"

     True enough, the boy attacked his plate faster than a cat in the wild. Without manners, we're no more

than animals. Actually, that's not true. I've been watching and feeding a group of wild cats, and they show

unusual politeness toward each other. Even when food is scarce, they take turns, leaving at least a small part

for the next in line.

     My mother educated her three children to have good manners all the time. We were made to feel very

uncomfortable as if we were sitting on pins and needles until we got used to saying please, thank you, pardon

me, and I'm sorry. And I have to say, while it was a painful learning experience, it was one of the most

valuable.

     I can't tell you how often I sat with my friends, eating at their dinner tables, and their parents thought highly

of my good manners. While it was a little embarrassing, I knew even then that my mother's teachings were

paying off.

     Many years later, when I was attending seminars across the country, my manners were quite useful.

     While I regret that I haven't been a perfect example, I'm still working on it. I suppose, in this regard, my

mother lives on through me. I didn't have her beautiful singing voice or her green eyes, but she did make sure

I received one of her finest characteristics.

1. What did the writer's friend most probably complain about? [ ]

A. Her son's eating too quickly.

B. Her son's not having a healthy diet.

C. Her son's not having good table manners.

D. Teenagers' not having good manners.

2. The underlined word "scarce" in Paragraph 3 probably means "_____". [ ]

A. too much

B. not delicious

C. not enough

D. quite hot

3. We learn that the writer's mother _____. [ ]

A. was strict about her children's manners

B. never punished her children

C. had beautiful blue eyes

D. was not good at singing

4. What does the writer think of her experience of learning good manners? [ ]

A. Easy and relaxing

B. Painful and valuable

C. Easy but useless

D. Too horrible

5. We can infer from the passage that the writer _____. [ ]

A. is surely liked by everyone around her

B. is not satisfied with most people's manners around her

C. thinks she has been a perfect example to the young

D. thanks her mother for teaching her the good manners a lot

下列符号与所表示的涵义正确的是

A．2O—2个氧元素

B．—1个钠离子

C．3Al³⁺—3个铝原子

D．CO₂—1个二氧化碳分子

信用卡透支是因持卡人信用消费所产生的尚未偿还的款项。