--Has your Chinese teacher been to the USA? --- Yes. She has been there twice. A. ever; yet B. yet; ever C. already; yet D. ever; already
20世纪50年代,下列事件改变了生产资料所有制性质的是( )①农业合作化运动 ②对资本主义工商业的改造 ③没收官僚资本A.①②③
(17分)白血病是一种常见的造血组织肿瘤性疾病。该病是由于造血干细胞受到致癌因子的作用,不能正常地完成分化,而是变成了不受机体控制的、连
(2010·山东临港一中高三上10月月考) 27.I have decided to ____ my proposal for urban development to the City Council. A. negotiate B. confirm C. prove D. submit
阅读下文,完成文后各题。 1789年,意大利科学家伽伐尼尔在一次做蛙腿实验时,首次发现细胞内存在生物电现象,随着对细胞生物电研究的深入,利用
一I’d have made a phone call to you, your telephone number. 一That’s all right.What was up then? A.if I knew B.had I forgotten C.if I hadn’t re
--How do you think I can make up with Tom? --Put aside ____you disagree and try to find ______you have in common. A. what; what B. what; where C. where; what D. what; whether
0.1 mol的单甘油酯A完全氢化时,需要标准状况下的氢气13.44 L,得到油脂B。0.1 mol A完全燃烧时生成的二氧化碳和水的物质的量之和为10.6 mol。求油脂A的