柱下对称独立基础,基础宽度为b,基础自重和其上的土重为G,为使基础底面不出现拉力,基础顶面所承受的柱底竖向力Fk和Mk必须满足以下何种关系?( )

A: B: C: D:

伸臂梁在图3-400所示荷载作用下,其弯矩M图和剪力V图可能的形状是:【2011-13】

A: B: C: D:

Study Helps Predict Big Mediterranean Quake

Scientists have found evidence that an overlooked fault in the eastern Mediterranean1 is likely to produce an earthquake and tsunami every 800 years as powerful as the one that destroyed Alexandria2 in AD3 365.

Using radiocarbon dating techniques, simulations and computer models, the researchers recreated the ancient disaster in order to identify the responsible fault. “We are saying there is probably a repeat time of 800 years for this kind of earthquake, ”said Ms. Beth Shaw, an earthquake scientist at the University of Cambridge, who led the study. Scientists study past earthquakes in order to determine the future possibility of similar large shocks.

Identifying the fault for the AD 365 earthquake and tsunami is important for the tens of millions of people in the region, Ms. Shaw said. The fault close to the southwest coast of Crete4 last produced a big enough quake to generate a tsunami about 1300, which means the next powerful one could come in the next 100 years, she added in a telephone interview.

Ms. Shaw and her colleagues calculate the likely intervals by measuring the motion of either side of the fault to find how often such large earthquakes would have to occur to account for that level of motion, she said. Their computer model suggested an 8 magnitude quake on the fault would produce a tsunami that floods the coastal regions of Alexandria and North Africa, the southern coast of Greece5 and Sicily6 all the way up the Adriati7 to Dubrovnik8. This would be similar to the ancient quake in AD 365 that caused widespread destruction in much of Greece and unleashed a tsunami that flooded Alexandria and the Nile Delta9, likely killing tens of thousands of people, she said.

 

词汇:

fault / fɔːlt / n. 断层

radiocarbon / ,reɪdɪəʊ"kɑːb(ə)n / n. 放射性碳

interval / "ɪntəvl/ n. 间隔

destruction / dɪ"strʌkʃən/ n. 破坏,毁灭

tsunami / tsuː"nɑːmɪ /n.海啸

simulation / ,sɪmjʊ"leɪʃən/n. 模拟

magnitude/ "mægnɪtjuːd / n. 等级

unleash/ ʌn"liːʃ/ v. 放出,释放 

 

注释:

1. the eastern Mediterranean: 地中海东部

2. Alexandria:阿里山大[埃及北部港市]  

3. AD: 公元后(AD是拉丁文 Anno Domini首字母的所写)

4. Crete: [希腊]克里特岛 

5. Greece: 希腊 

6. Sicily: [意大利]西西里岛

7. Adriati:亚得利亚海 

8. Dubrovnik: 杜布罗夫尼克[克罗地亚港市]

9. Nile Delta:尼鲁河三角洲 [埃及]

It is fun to identify the fault for the AD 365 earthquake and tsunami.

A:Right B:Wrong C:Not mentioned

支托的宽度应是()

A:磨牙面颊舌径的2/3 B:磨牙面颊舌径的1/2 C:前磨牙面颊舌径的1/3 D:前磨牙面颊舌径的1/2 E:磨牙面颊舌径的2/3

人民币远期利率协议计息基准中的“A/365F”的含义是()。

A:实际天数/实际天数 B:实际天数/365(浮动) C:实际天数/360 D:实际天数/365(固定)

主机域名www.fm365.com.cn由四个子域组成,其中哪个子域代表主机名?()

A:WWW B:fm365 C:com D:cn

已知电子邮箱地址为jndhsg@fm365、com、cn,其中用户名是()。

A:Jndhsg B:Fm365 C:Fm365、Com、cn D:以上三种都不对

债券远期交易共有8个期限品种,期限最短为2天,最长为365天,其中()品种最为活跃。

A:2天 B:30天 C:7天 D:365天

在F=A 中,被称为年金终值系数的是()。

A:1+i B:(1+i)n C:(1+i)n-1 D:

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