【判断题】思辨方法阶段是在科学实验的基础上来研究物质的组成和结构等问题的。( )A. 对 B. 错
【单选题】英译汉:“means of conveyance;means of transport”,正确的翻译为:( )。
【简答题】一种重要的药物中间体E的结构简式为: ,合成E和高分子树脂N的路线如下图所示: 已知: ① ② 请回答下列问题: (1)合成高分子树脂N ① A中含氧官能团的名称为_____________。 ② 由A可制得F,F的结构简式为___________________;F→G的反应类型为__________。 ③ G有多种同分异构体,其中一种异构体X的结构简式为: ,下列有关X的说法正确的是_____...
【判断题】竞争优势就是企业拥有超过行业平均盈利水平的能力。( )
【单选题】The word 'subject' in the passage means______.
A.
the college course the students take
B.
the theme of the listening material
C.
a branch of knowledge studied
D.
the student experimented on
【单选题】"College is a place to be greedy" means__.
A.
College is a place will people were taught to be greedy.
B.
All the people in college should be greedy.
C.
One will get ready If he enters college
D.
students should try their best to learn as much as they can.
【判断题】不可扩张的市场,其需求规模几乎不受市场营销水平的影响。 ( )
【简答题】英译汉Good business communications use concise words. Concise means brief, to the point, or short. Concise words, however, are comprehensive; they carry the write’s full meaning.
【简答题】Ⅰ.下图中A、B、C分别是三种有机物的结构模型: 请回答下列问题: (1)A及其同系物的分子式中的碳原子数用n表示。当n=_______时,烷烃开始出现同分异构体。B模型是有机物的________模型。 (2)结构简式为 的有机物中,分子中最多有 个原子共面。 (3)等质量的A、B、C三种有机物完全燃烧生成H 2 O和CO 2 ,消耗氧气的体积(相同状况下)最大的是________(填分子式)。 ...