清水混凝土拌合物从搅拌结束到入模前的时间不宜超过（）
A.60min
B.90min
C.100min
D.120min
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A、导语是新闻开头的第一段或第一句话，它扼要地揭示新闻的核心内容；主体是新闻的躯干，是对导语内容的进一步扩展和阐释；背景指的是新闻发生的社会环境和自然环境。背景必须独立成段。
B、《芦花荡》的作者是孙犁，他所叙述的干瘦的老头子勇敢作战的故事发生在解放战争时期的白洋淀。
C、《蜡烛》写的是一位南斯拉夫母亲将珍藏了45年的两支结婚花烛，点在一位苏联红军士兵的坟头上的故事。展现了反法西斯阵营的军民用血肉凝成的情谊。
D、雨果是英国作家，他愤怒地谴责了英法联军远征中国的罪行，表达了对被侵略、被掠夺者的巨大同情。
| 阅读理解。 | ||||
| About ten years ago, a young and very successful manager named Josh was traveling down a Chicago neighborhood street. He was going a bit too fast in his expensive new car, 1 was only two months old. He was 2 for kids rushing out from between parked cars and 3 down when he thought he saw something. As his car passed, no child rushed out, 4 a brick (砖) sailed out and-WHUMP!-it smashed (砸向) into the Jaguar XKE's (美洲豹车) shiny black side door! SCREECH...!!!! Josh became very 5 . He drove back to the place from where the brick had been thrown. Josh 6 out of the car, caught hold of the kid and pushed him up against a parked car. He shouted at the kid, "What was that all about and who are you? Just what 7 are you doing?!" Still angry, he went on. "That's my new car and that brick you threw is going to 8 you a lot of money. Why did you throw it?" "Please, mister, please... I'm sorry! I didn't know what else to do!" begged the boy. "I threw the brick 9 no one else would stop!" Tears were running down as he pointed around the parked cars. "It's my brother, mister," he said. "He fell out of his wheelchair and I can't 10 him up." Crying, the boy asked the manager, "Would you please help me get him back into his 11 ? He's hurt and he's too 12 for me." Deeply 13 by his words, the young manager tried hard to hide his feelings. With great effort (努力), he lifted the young man back into the wheelchair and took out his handkerchief (手帕) and wiped the scrapes and cuts (伤口), 14 to see that everything was going to be 15 . He then watched the younger brother push him down the sidewalk toward their 16 . It was a long walk back to his expensive Jaguar XKE-a long and 17 walk. Josh never did 18 the side door of his Jaguar. He kept the dent (痕迹) to 19 himself not to go through life so fast that someone has to throw a brick at him to get his 20 ... | ||||
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盐酸麻黄碱
A．硫酸铜
B．溴水和氨试液
C．发烟硝酸和醇制氢氧化钾
D．甲醛硫酸试液
E．重铬酸钾
以下药物特征鉴别反应所采用的试剂是
窗扇是窗的活动部分，需要牢固（）
信贷风险管理是为了（）、减少贷款损失、提高贷款质量，从而增强银行风险控制能力和损失补偿能力的一种贷款管理活动。
A、增加银行收入
B、控制资金流动
C、调节市场规律
D、降低贷款风险