现有H2SO4、NaOH、CuO、Na2CO3四种物质，分别与其他物质反应，都有

下面有关蝉的叙述，正确的是

A．蝉具有极强的繁殖能力，受精方式是体外受精

B．盛夏，雄蝉在枝叶间高声鸣叫，是一种学习行为

C．蝉一生蜕皮4~5次，其实“皮”是蝉的外骨骼

D．蝉的发育过程经历卵、幼虫、蛹、成虫四个阶段，属于不完全变态发育

女性，60岁。近3个月来大便次数增多，有肛门坠胀感及里急后重，大便变细，常有黏液血便，经抗生素治疗症状可缓解，但不久又复发，且呈进行性加重。

若经病理检查证实为直肠腺癌，肿瘤下缘距肛门约12cm，肿块直径为4cm。最佳手术方式应选择（）。

A.Dixon手术

B.Miles手术

C.Hartmem手术

D.局部切除

E.乙状结肠造口术

They travel in groups, noses just inches away form GPS screen. Suddenly a boy shouts “I found it!”, grinning and walking away from the group.

The others focus on their screens. “Me. too!” shouts another a moment later, until all six kids are crowded around a tree, pulling out a plastic bottle painted to look like tree bark. It doesn’t seem like much from the outside, but everyone gathers around, eager to see what’s inside.

This is geocaching, a high-tech game played using coordinates (坐标) and global positioning systems to find hidden “treasures”.

It’s open to anyone—hiders or seekers—with a GPS and access to www.geocaching.com, where more than half a million users download and upload the coordinates of nearly 1 million hidden caches (储藏物) and write about their experiences in this worldwide hunt.

Although some adventures can take hours or even days, the contents inside the actual cache usually aren’t valuable—often just a book or a small trinket (小饰品).

But participants aren’t in it for the treasure. They say it’s a great way to exercise. Or it brings them to remote destinations or historical sites. Some consider it an extreme sport, looking for geocaches hidden in mountains or in other nearly inaccessible locations.

Jeffrey Howe, 41, sees it as an opportunity to take kids on adventures to unfamiliar places. The youths at the shelter mostly come form the city, but geocaching has taken them to parks, the suburbs, and, once, to a 498-meter-high mountain.

“Geocaching is a way to give kids the idea that there’s a whole world out there other than what they know from their home neighborhoods and video games,” he said.

How does it work? Log onto the Website and enter your zip code (邮编), then search for caches near your location. Although posted coordinates will take a GPS within about 4.5 meters of a cache, a good hide will require seekers to do a bit of hunting around. Caches can’t be buried underground, nor can they be hidden on private property (财产), in dangerous locations or in some national parks.

Posts written about the find—whether successful or unsuccessful—are an important part of the game, with users proudly recording the places to which they’ve traveled.

1.    What is the meaning of the underlined word geocaching in paragraph 3?

A. A computer game played all over the world.

B. A TV series popular around the world.

C. An outdoor game of hiding and finding things.

D. A name of the latest GPS.

2. In geocaching, which of the following statements about players is NOT TRUE?

A. Players need to have GPS to play the game.

B. Players need to download the coordinates to find the hidden caches.

C. Players need to be young and strong to the play the game.

D. Players are asked to hide things in parks or other places most people can reach.

3.    What is Jeffrey Howe’s attitude toward geocaching?

A. Negative.   B. Objective.  C. Uncertain.  D. Supportive.

4.    Many people like to play this game because __________.

A. they take pleasure in the process of the game

B. they like to visit historical sites

C. they want to find some treasure

D. they want to change their lives

患者，男性，49岁，公司职员。查体：身高179cm，体重85kg，血压140/88mmHg，空腹血糖7.2mmol/L，血脂正常。平时食量较大，拟采用饮食疗法。

该患者饮食中的饱和脂肪酸应（）

A.占总能量15%

B.禁用饱和脂肪酸

C.占脂肪总量50%

D.小于总能量10%

E.占脂肪总量0.5%

背景资料： 某中型水闸工程施工招标文件按《水利水电工程标准施工招标文件》（2009年版）编制。已标价工程量清单自分类分项工程量清单、措施项目清单、其他项目清单、零星工作项目清单组成。其中闸底板C20混凝土是工程量清单的个子目，其单价（单位：100m³）根据《水利建筑工程预算定额》（2002年版）编制，并考虑了配料、拌制、运输、浇筑等过程中的损耗和附加费用。 事件1：A单位在投标截止时间提前交了投标文件。评标过程中，A单位发现工程量清单有算术性错误，遂以投标文件澄清方式提出修改，招标代理机构认为不妥。 事件2：招标人收到评标报告后对评标结果进行公示，A单位对评标结果提出异议。 事件3：经过评标，B单位中标。工程实施过程中，B单位认为闸底板C20混凝土强度偏低，建议将C20变更为C25。经协商后，监理人将闸底板混凝土自C20变更为C25。B单位按照变更估计原则，以现行材料价格为基础提交了新单价，监理人认为应按投标文件所附材料预算借个未计算基础提交新单价。 本工程在宴施过程中，涉及工程变更的双方往来函件包括（不限于）：①变更意向书，②书面变更建议，③变更指示，④变更报价书，⑤撤销变更意向书，⑥难以实施变更的原因和依据，⑦变更实施方案等。

指出事件1中，A单位做法有何不妥？说明理由。