题目

如图12所示，是一种可折叠式军用铁锹，它具有挖、砍、锯、刨、剪、撬等多种用途。它一边磨得很薄，主要是为了减小受力面积，增大__________，从而方便切东西；他的手柄做得较粗糙是为了增大_________。折叠铁锹时，手作用在________（填“手柄”或“铲口”）更省力。 答案：压强  摩擦（手与手柄之间的摩擦、接触面粗糙程度）  A21、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 carrels 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． 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． 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 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． 评卷人 得分 四、书面表达 （每空？ 分，共？ 分）