微生物营养类型有几种？划分的依据是什么？

小明玩抛硬币的游戏，规则是：将一枚硬币抛起，落下后正面朝上就向前走15步，背面朝上就向后退10步．小明一共抛了10次硬币，结果向前走了50步，硬币正面朝上有______次，背面朝上有______次．

现代文阅读（22分）

赎回良心（11分）

二十多年前，那时我读高中，手表还是稀罕物。有一天，同桌买了一块新手表，戴在手上，挽起衣袖神气得很，惹得全班同学羡慕不已。班上很快又有几个人买了新手表。我做梦都想拥有一块手表，也好让别人羡慕一回。星期天回家的时候，我鼓起勇气对母亲说：“妈，我想买一块手表。”母亲说：“家里连稀粥都快没得喝了，哪有钱给你买手表?”　听了母亲的话我很失望，草草喝了两碗稀粥就准备返回学校。突然，父亲开口问道：“你要手表干什么?”

　　父亲的话又燃起我的一点希望，我连忙谎称道：“现在加班加点复习功课准备高考，毕业班都不按学校的时间表上课，班上人人戴手表，自己看时间。”说完，我着急地等待　父亲说一句答应的话，可他却蹲在门口，什么也没有说。

　　两手空空回到学校，我再也不敢做戴手表的美梦了。然而几天后，母亲突然来到学校，从内衣里掏出一个小小的花布包，打开一层又一层，里面竟是一块崭新的上海牌手表。我接过手表，戴到手上，立刻有一种飘飘欲仙的感觉。我挽起一圈衣袖，好让别人能看见我的手表。

　　见我这样子，母亲连忙将我的衣袖放下来，说：“这么贵重的东西，用衣袖罩住，也好护一护。千万别弄丢。我走了。”我把母亲送到学校门口问：“家里怎么突然有钱了?”母亲说：“你爸卖了一回血。”

　　父亲卖血给我买手表？！我的脑袋“嗡”地一响，心里难受极了。送走母亲后，我就把手表取下来，重新用布包好。当天我就向同学打听，有谁要买新手表。同学们问我自己为什么不戴，我说不想戴。他们不信，认定我的手表一定有毛病，竟没有一个人愿意买。

　　最后，我请班主任帮忙寻找买主，并流着眼泪把事情真相告诉了他。班主任拍拍我的肩膀说：“别难过。我正好要买一块手表，就转让给我吧。”班主任按原价买下了我的手表，而我从来没见班主任戴过新表，每次问他为什么不戴时，他总是笑而不语。

　　后来我考上了大学，并留在了远离家乡的省城工作，但那块手表却成了我心底永远放不下的挂念。

　　后来找机会我特意回了趟老家，找到当年的班主任，问起那块手表。班主任已经老了，头发也花白了，他告诉我说：“手表还在。”说着，便从衣柜里取出母亲当年用的那个小花布包，一层层打开，里面的手表竟然还是崭新的！

　　我惊奇地问：“您怎么不戴它?”班主任说：“我等你回来赎呢。”我又问：“您怎么知道我会回来赎它?”老师说：“因为它不光是一块手表，更是一个人的良心。”

小题1:.①作者在文中追忆了二十多年前的哪些事？（3分）②这些事以什么为线索？（1分）

小题2:. 为儿子买这块手表凝聚了父亲的什么愿望?（1分）

小题3:. 知道父亲卖血给我买手表的事以后，请想象“我”的心理活动有哪些?（2分）

小题4:. 为什么手表成了我心底永远放不下的挂念？（1分）

小题5:. 文题中，表达了作者什么感情?为什么会产生这种感情?（3分）

   For the people living in the Nile Basin, the river is their life:. This 6,825 km waterway, whose watershed（流域） covers three million square kilometers, flows through mountains ,woodlands, lakes and deserts. Its potential for fishing, tourism and shipping is great—but so are its challenges.

Water shortage , already serious in Egypt and Sudan , will soon influence several other countries in the watershed as well. Today, about 160 million people depend on the Nile River for their living. Within the next 25 yeas ,the district's population is expected to double, adding to the demand brought about by growth in industry and agriculture. The frequent drought（干旱）adds to the urgency.

Water quality is also a problem. Precious soil is washed out to sea. Wastes from industry and agriculture create pollution. Higher concentrations of salt influence irrigated soils. Water-borne diseases continue unchecked. In areas where it's hot and damp, water hyacinths choke off lakes, dams and other sections of the river, making it difficult for fishing and other businesses to move forward.

Native people along the narrow area of farmland have watched the sand move closer day by day. They’ve seen the river change course, and their only source（来源） of water thickened with mud. They’re very poor and have few choices.

But a new program, the Nile Basin Initiative （NBI），is offering very practical assistance. The program is more than just a water-management project. It’s a plan for the social and economic development of a vast district: it concentrates on the needs of the poorest of the poor and the environment that supports them.

These are whole ecosystem problems, calling for united solutions（解决办法）. Half the Nile Basin's countries are among the world's poorest nations；yet, somehow, they must find the  resources, skills and political will to overcome these challenges.

68. What are the great challenges the Nile Basin faces？

A. The development of .shipping industry.

B. Overfishing of native people.

C. Water shortage and water quality.

D. Increasing population and tourism.

69. The underlined word “hyacinths”（in Paragraph 3） refer to “          ”.

A. animals                           B. plants                     C. rocks                                D. salts

70. The program NBI is mainly aimed at           .

A. preventing water pollution                             B. changing the river course

C. improving living condition of the poor

D. preventing land from becoming desert

71. What would be the best title of this passage？

A. People's Life in Egypt and Sudan

B. Frequent Drought in Egypt and Sudan

C. The Poorest Countries in the Nile Basin

D. The Ecosystem Problems in the Nile Basin

黛西是在一个热得不行的（）月天结婚的。

A.六

B.七

C.八

D.九

动产质权自出质人交付质押财产时设立。

A、正确

B、错误