已知A、B、C、D、M、W六种元素的原子序数依次递增，都位于前四周期。其中A、D原子的最外层电子数均等于其周期序数，且D原子的电子层数是A的3倍；B原子核外电子有6种不同的运动状态，且S轨道电子数是P轨道电子数的两倍；C原子L层上有2对成对电子。M和W均有“生物金属”之称，M⁴⁺离子和氩原子的核外电子排布相同；W处于周期表中第8列。请回答下列问题：

（1）l mol B₂A₂分子中含σ键的数目是             。

（2）BC ₂在高温高压下所形成的晶体其晶胞（晶体中最基本的重复单元）如图所示。则该晶体的类型属于         晶体（选填“分子”、“原子”、“离子”或“金属”）；该晶体中B原子轨道的杂化类型为                。

（3）“生物金属”M内部原子的堆积方式与铜相同，都是面心立方堆积方式，如图。若该晶胞的密度为ρ g/cm³，阿伏加德罗常数为N_A，M原子的摩尔质量为Mr g/mol，则该晶胞的“边长”为      cm。

（4）“生物金属”W元素应用广泛，如人体内W元素的含量偏低，则会影响O₂在体内的正常运输。已知W²⁺与KCN溶液反应得W（CN）₂沉淀，当加入过量KCN溶液时沉淀溶解，生成配合物，其配离子结构如图所示。

①W元素基态原子价电子排布式为                   。

②CN^—与       （一种单质分子）互为等电子体。

（5）光谱证实单质D与强碱溶液反应有[D(OH)₄]^—生成，则[D(OH)₄]^—中存在          。

a．极性键        b．配位键        c．σ键        d．π键

Recently, I flew to Las Vegas to attend a meeting. As we were about to arrive, the pilot announced with apology that there would be a slight (16) before setting down. High desert winds had (17) the airport to close all but one runway. He said that we would be (18) the city for a few minutes waiting to (19) . We were also told to remain in our seats meanwhile with our seat belts fastened (20) there might be a few bumps(颠簸). Well, that few minutes turned into about four-five minutes, including a ride that would make a roller coaster(过山车) (21) by comparison. The movement was so fierce that several passengers felt (22) and had to use airsickness bags. As you might guess, that’ s not a good thing to have happen in a(n) (23) space because it only (24) to increase the discomfort of the situation.

About twenty minutes into the adventure, the entire airplane became very (25) There was now a sense of anxiety and fear that could be (26) noticed. Every passenger simply held on for dear life …except one. A (27) was having a good time！ With each bump of the (28) , he would let out a giggle (咯咯地笑)of delight. As I observed this, I (29) that he didn’t know he was supposed to be afraid and worried about his (30) . He neither thought about the past nor about the future. Those are what we gown--ups have learned from (31) . He was (32) the ride because he had not yet been taught to fear it. Having understood this, I took a deep breath and (33) back into my seat, pretending I was (34) on a roller coaster. I smiled for the rest of the flight. I even (35) to giggle once or twice, much to the chagrin(随恼) of the man sitting next to me holding the airsickness bag.

（35）（）

A．attempted

B．managed

C．wanted

D．decided