问题
选择题
给画线的字选择正确的解释，将序号填在括号里。
郑重其事 [ ]
A．言行不轻率。
B．认为重要。
C．程度深。
答案
答案：A
搜题请搜索小程序“爱下问搜题”
给画线的字选择正确的解释，将序号填在括号里。
郑重其事 [ ]
A．言行不轻率。
B．认为重要。
C．程度深。
答案：A
化学在能源开发与利用中起着十分关键的作用。氢气是一种新型的绿色能源，又是一种重要的化工原料。
I．氢氧燃料电池能量转化率高，具有广阔的发展前景。现用氢氧燃料电池进行如图实验（图中所用电极均为惰性电极）：
（1）对于氢氧燃料电池中，下列表达不正确的是________
A．a电极是负极，OH－移向正极
B．b电极的电极反应为：O2＋2H2O＋4e－＝4OH－
C．电池总反应式为：2H2+O2
2H2O
D．电解质溶液的pH保持不变E．氢氧燃料电池是一种不需要将还原剂和氧化剂全部储藏在电池内的新型发电装置
（2）上图装置中盛有100mL、0.1mol·L—1AgNO3溶液，当氢氧燃料电池中消耗氢气112mL（标准状况下）时，则此时上图装置中溶液的pH＝________（溶液体积变化忽略不计）
II．氢气是合成氨的重要原料。工业上合成氨的反应是：
N2(g)＋3H2(g)
2NH3(g) ΔH＝－92.20 kJ·mol－1。
（1）下列事实中，不能说明上述可逆反应已达到平衡的是________
①单位时间内生成2n mol NH3的同时生成3n mol H2
②单位时间内生成n mol N—H的同时生成n mol N≡N
③用N2、H2、NH3的物质的量浓度变化表示的反应速率之比为1︰3︰2
④N2、H2、NH3的体积分数不再改变
⑤混合气体的平均摩尔质量不再改变
⑥混合气体的总物质的量不再改变
（2）已知合成氨反应在某温度下2L的密闭容器中进行，测得如下数据：
| 时间（h） 物质的量（mol） | 0 | 1 | 2 | 3 | 4 |
| N2 | 1.50 | n1 | 1.20 | n3 | 1.00 |
| H2 | 4.50 | 4.20 | 3.60 | n4 | 3.00 |
| NH3 | 0 | 0.20 | n2 | 1.00 | 1.00 |
根据表中数据计算：
反应进行到2小时时放出的热量为________
0～1小时内N2的平均反应速率________mol·L－1·h－1；
③此条件下该反应的化学平衡常数K=________（保留两位小数）
④反应达到平衡后，若往平衡体系中再加入N2、H2和NH3各1.00mol，化学平衡将向________ 方向移动（填“正反应”或“逆反应”、“不移动”）。
| Elle Woods has it all. She’s the president of her sorority, a Hawaiian Tropic girl, Miss June in her campus calendar, and, above all, a natural blonde. She dates the cutest fraternity boy on campus and wants nothing more than to be Mrs. Warner Huntington Ⅲ. But, there’s just one thing stopping Warner from popping the question: Elle is too blonde. Growing up across the street from Aaron Spelling might mean something in LA, but nothing to Warner’s East-Coast blue blood family. So, when Warner packs up for Harvard Law and reunites with an old sweetheart from prep school, Elle rallies all her resources and gets into Harvard, determined to win him back. But law school is a far cry from the comforts of her poolside and the mall. Elle must wage the battle of her life, for her guy, for herself and for ail the blondes who suffer endless indignities every day. "Legally Blonde" is an American comedy which was released in 2001 wordwide. The heroine is played by Reese Witherspoon, who does well in the movie. In my opinion, strictly, "Legally Blonde" is a not-so-bright comedy. Why The combination of a beautiful but silly blonde and the strict but dull law school makes inconsistent musical notation. But I am well disposed to the lovely girl at the same time. There are a lot of reasons. For one thing, the outstanding performance of Reese Witherspoon makes a deep impression on my mind. For another, the magic and special character of the heroine Elle moves me. She is sensitive to fashion and good at making up, but not the silly Billy. Her perfect observation also lights up our eyes. When she went to visit the prisoner, with a CalvinKlein blouse, a suit of Clinique and the last Cosmo, who could doubt her ability to get the trust When she won the case by her experience about her life, nobody could deny that sometimes a handful of common sense was worth a bushel of learning. |
We can assume that when Elle went to visit the prisoner, she was wearing very ______clothes.
A．fashionable
B．absurd
C．appropriate
D．ugly