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Kenya wants to organize a major international conference to discuss how to fight piracy(海盗) off the coast of Somalia. The conference may also deal with ways to rescue Somalia from seventeen years of civil war. More than forty percent of its people depend on food aid. Kenyan Foreign Minister Moses Wetangula says the world cannot end piracy and civil war without dealing with Somalia’s political problems. Somali pirates operate in the Indian Ocean and the Gulf of Aden. The Gulf of Aden connects the Red Sea to the Mediterranean by way of the Suez Canal. The pirates have fast boats, modern weapons and equipment like satellite phones and global positioning systems. Pirates hijacked the Sirius Star off the coast of Kenya and moved it to waters off Somalia. The tanker Sirius Star, at three hundred thirty meters long, is the biggest ship ever known to have been captured by pirates. It also happened farther south than most attacks, and farther out at sea ---- more than eight hundred kilometers from land. The ship was headed for the United States with two million karrels of oil, worth an estimated one hundred million dollars. A Saudi Arabian company owns the tanker. The pirates have  reportedly demanded twenty-five million dollars in negotiations to release the ship and its crew of twenty-five. Somali pirates generally do not steal goods or kill hostages. They are believed to be holding seventeen ships with about three hundred crew members. Among the ships is a Ukrainian vessel hijacked(劫持) in September with a load of military weapons including tanks. The increase in piracy is raising the cost of insuring ships. Also, oil from the Middle East and exports from East Asia could take longer to arrive. Some of the world’s heaviest shipping traffic passes the Somali coast. But major shipping companies have begun to consider new routes. One of the world’s biggest shippers, A.P, Moeller Maersk, says it will avoid the Gulf of Aden. A move away from the Suez Canal could hurt Egypt’s economy. American and other foreign navy ships are now watching for pirates. This week the Indian Navy destroyed a heavily armed “mother ship” in the Gulf of Aden. But the area to protect covers more than one hundred sixty million square kilometers. 小题1: According to the passage, which of the following is the key to solving the piracy in Somalia? A.Providing lots of money. B.Ending Civil war. C.Supplying enough food. D.Handling Somalia’s political problems. 小题2: Somali pirates do the following things except that _______. A.they demand money B.they hold the ships with crew C.they kill some of the hostages D.they hijack ships with military weapons 小题3:What can we infer from the passage? A.The cost of ship transport is decreasing. B.The routes of some ships might change. C.Nothing has been done to fight against the piracy. D.The Suez Canal is of no importance to Egypt’s economy.
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【判断题】棘皮动物属于后口动物 ,其 原口发育为成体的口。
A.
正确
B.
错误
【单选题】不属于棘皮动物特征的是
A.
后口动物
B.
原口动物
C.
五辐射对称
D.
水管系统
【简答题】棘皮动物的囊胚经()而形成原肠胚,以()形成体腔,胚胎发育时的原口将来变成(),它区别于原口动物而属()。
【判断题】常用的混合砂浆的主要成分为石灰、水泥和砂。
A.
正确
B.
错误
【单选题】两方位定位时,仅考虑偶然误差的影响,位置线交角θ最佳值为:
A.
任意角度
B.
90º
C.
30º30º或θ>150º
【单选题】不同类群的动物均有一些独有的特征,下列结构中,属于棘皮动物特有的是()
A.
原口
B.
水管系
C.
水沟系
D.
两侧对称
【简答题】棘皮动物的囊胚经___形成原肠胚,以___形成体腔,胚胎发育时的原口以后变成___,它区别于原口动物而属于___。
【单选题】两方位定位时,仅考虑偶然误差的影响,位置线交角θ最佳值为:
A.
任意角度
B.
90º
C.
30º
D.
θ>30º或θ>150º
【单选题】两方位定位时,仅考虑偶然误差的影响,位置线交角θ最佳值为 。
A.
任意角度
B.
90°
C.
30°<θ<150°
D.
θ>30°或θ>150°
【多选题】下面说法错误的有()
A.
柱头虫具有咽鳃裂
B.
半索动物隶属于无脊索动物,是原口动物
C.
半索动物和棘皮动物的中胚层形成方式相似,都是端细胞法。
D.
脊索动物肌肉中含有肌酸化合物。
E.
非脊索动物肌肉中含有肌酸化合物。
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