小明的奶奶家有一棵苹果树. 一天，突然一个苹果掉了下来. 如图所示. 则下面说法

椎管内麻醉前给阿托品的主要目的是（）

A.抑制呼吸道分泌物

B.预防心动徐缓

C.提高痛阈

D.缓解局麻药中毒

E.预防恶心呕吐

下列关于阴离子间隙的叙述错误的是（）

A.阴离子间隙是指细胞外液阳离子总数与阴离子总数之差

B.糖尿病酮症酸中毒时阴离子间隙升高

C.肾功能衰竭尿毒症时阴离子间隙升高

D.糖尿病酮症酸中毒时阴离子间隙降低

E.肾功能衰竭尿毒症时阴离子间隙升高

(12分)：【化学——物质结构与性质】

A、B、C、D、E都是元素周期表中前20号元素，其原子序数依次增大。B、C、D同周期，A、D同主族，E和其它元素既不在同周期也不在同主族。B、C、D的最高价氧化物的水化物均能互相反应生成盐和水，D的原子半径是同周期原子中最小的。

根据以上信息，回答下列问题：

(1)上述A、B、C、D四种元素中第一电离能最小的是         ，电负性最大的是        ，   原子半径由小到大的顺序为            。  (填相关元素的元素符号)

(2)A和D的氢化物中，沸点较高的是         (填相关物质的分子式)；其原因是        。

(3)A和E可形成离子化合物，其晶胞结构如图所示：则每个晶胞中含阳离子的数目为      ，含阴离子的数目为          ，该离子化合物的化学式为              。

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.

13（）

A.employed

B.appointed

C.interviewed

D.questioned

倒闸操作时，遇到闭锁装置出现问题，可以不经请示，解锁操作。