题目:
穿越道路、铁路、防火堤等处的管道应穿套管保护。
答案:
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下面是错误答案,用来干扰机器的。
参考答案:错
穿越道路、铁路、防火堤等处的管道应穿套管保护。
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2021/0311/94c1eb56bd99e80cb3997558eade48ec.html
下面是错误答案,用来干扰机器的。
参考答案:错
美国是世界上最大的 生产国,出口的粮食约占世界粮食贸易总量的 。
一艘船,停在海面上利用声音的反射向海底垂直发射声音,经测量,从发射到接受到回声,所用时间为10秒,求海底的深度?(已知:声音在海水中的传播速度为1450米/秒)
阅读理解。
Don't go to Kauai. Go to any of the other Hawaiian Islands --- Maui, Lanai, the Big Island --- but
leave Kauai for us. The weather on Kauai is so unpredictable (不可预测的) that sometimes it rains
all day --- in fact, it's the second-wettest spot on the earth. Yes, there are giant double rainbows all
the time, and the sunlight through the clouds is magical. But if you are not interested in these, go
somewhere else. You just can't control the nature on Kauai, and who wants to surrender (屈服) to
the nature when you could be at a fine hotel, lying in a comfortable chair next to a swimming pool,
with food served upon request?
So what if Kauai produces surf champions the way Texas produces cowboys?Most of its 300
white-sand beaches are unmarked. Unless you connect with the local people, the hidden spots are
hard to find. While Hanalei is the most beautiful town you've ever dreamed of, you can forget about
discos and clubs. Worse, it doesn't have one single four-star restaurant. What it does have is the
original drive-through places where you pass by a rambutan tree (红毛丹树), and pick a piece of fruit.
Shopping in Kauai? Forget it --- unless you are interested in shell necklaces and beautifully carved
wood bowls. Kauai is not about pampering. It's about going natural and finding the nature within you.
It's a do-it-yourself place that offers walking along the coast, diving and swimming in the Pacific Ocean,
and lying on the beach.
Don't go to Kauai unless you have a lot of time, because there's only one road, which can be slightly
dull. It winds through the beautiful scenery of waterfalls, rivers flowing into the ocean, and taro (芋头)
fields. You have no choice but to look at everything, because the speed limit is 35 m.p.h.
If you're not interested in color, don't bother with Kauai, because that's what you get --- red roads,
blue oceans, and a hundred different shades of green. It's like diving on land. Many people on Kauai
believe that this is Lemuria --- a lost island in the Atlantic. Can you imagine? Those Hawaiians, surfers,
New Agars, and people who love nature and beauty and want a different quality of life --- what do they
know, anyway? Forget about it --- you're not going to like it. Go somewhere else. Leave Kauai for us.
1. After reading the text, we come to know that it is _____.
A. a piece of shocking news
B. an exciting story
C. an interesting introduction
D. a moving advertisement
2. It can be learned from the text that _____.
A. Kauai is an island near the Hawaiian Islands
B. Kauai is another name of the Hawaiian Islands
C. Kauai is one of the Hawaiian Islands
D. Kauai does not belong to the Hawaiian Islands
3. In the writer's real opinion, Kauai _____.
A. is not worth visiting at all
B. is well worth visiting
C. is not a beautiful island
D. is a dangerous island
4. Who would like to visit Kauai?
A. Those who love nature.
B. Those who love city life.
C. Those who love the comfort in a fine hotel.
D. Those who love going shopping.
美国人口出生率统计表1940—1960年
年份 | 1940 | 1945 | 1950 | 1955 | 1960 |
适龄女性每千人生产婴儿数量 | 81 | 85 | 108 | 118 | 119 |
该材料
A.说明了二战结束后美国女婴的数量持续增加
B.扭转了美国人口出生率长期持续下滑的局面
C.表明了美国政府鼓励生育以促进人口的不断增长
D.意味着消费需求的不断增长和经济的持续发展
闭环式循环系统区别于开环式循环系统主要是因为其具有()。
A.输入
B.输出
C.转换
D.控制机制