Millions of Americans and foreigners see GI.Joe as a mindless war toy, the symbol of American military adventurism, but that’ s not how it used to be. To the men and women who (1) in World War I1 and the people they liberated, the GI. was the (2) man grown into hero, the pool farm kid torn away from his home, the guy who (3) all the burdens of battle, who slept in cold foxholes, who went without the (4) of 1hod and shelter, who stuck it out and drove back the Nazi reign of murder. This was not a vohmteer soldier, not someone well paid, (5) an average guy, up (6) the best trained, best equipped, fiercest, most brutal enemies seen in centuries.

His name is not much. GI. is just a military abbreviation (7) Govermnent Issue, and it was on all of the article (8) to soldiers. And Joe A common name for a guy who never (9) it to the top. Joe Blow, Joe Magrae... a working class name.The United States has (10) had a president or vieepresident or secretary of state Joe.

GI. Joe had a (11) career fighting Geman, Japanese, and Korean troops. He appears as a character, or a (12) of American personalities, in the 1945 movie The Story of GL Joe, based on the last days of war correspondent Ernie Pyle. Some of the soldiers Pyle (13) portrayde themselves in the fihn. Pyle was famous for covering the (14) side of the warl, writing about the dirt-snow-and-mud soldiers, not how many miles were (15) or what towns were captured or liberated. His reports (16) the "willie" cartoons of famed Stars and Stripes artist Bill Maulden. Both men (17) the dirt and exhaustion of war, the (18) of civilization that the soldiers shared with each other and the civilians: coffee, tobacco, whiskey, shelter, sleep. (19) Egypt, France, and a dozen more countries, G. I. Joe was any American soldier, (20) the most important person in their lives.

（16）（）

A.paralleled

B.counteracted

C.duplicated

D.contradicted

（18分）某化学兴趣小组用含有铝、铁、铜的合金制取纯净的氯化铝溶液、绿矾晶体[FeSO₄·7H₂O]和胆矾晶体，以探索工业废料的再利用。其实验方案如下：

回答下列问题：

（1）写出合金与烧碱溶液反应的离子方程式                            。

（2）由滤液A制AlCl₃溶液的途径有①和②两种，你认为合理的是                      。上述实验方案多处采用了过滤操作，过滤所用到的玻璃仪器有                         和玻璃棒；其中玻璃棒的作用是                 。

（3）用滤渣F通过两种途径制取胆矾，与途径③相比，途径④明显具有的两个优点是                    、                                    。

（4）通过途径④制取胆矾，必须进行的实验操作步骤：加硫酸、加热通氧气、过滤、                 、冷却结晶、          、自然干燥。其中“加热通氧气”所起的作用为                                 （用离子方程式表示）。

（5）测定所得胆矾（CuSO₄·xH₂O）中x值的实验方案是蒸发硫酸铜晶体中的水得到白色的无水硫酸铜，冷却后称量。此变化的化学方程式为：CuSO₄·xH₂O===CuSO₄+xH₂O ，但温度过高，CuSO₄会继续分解为CuO和SO₃。在此实验过程中，称量操作至少进行         次。若测定结果x值偏高，可能的原因是         。

a．加热温度过高                b．加热时胆矾晶体飞溅出来      

c．加热后放在空气中冷却         d．所用坩埚事先未干燥（潮湿）