【简答题】口服抗菌药利君沙的制备原料G和某种广泛应用于电子电器等领域的高分子化合物I的合成路线如下: (1)A的结构简式是______,A→B的反应类型是________,D中官能团的名称__________。 (2)写出E→F的反应方程式_______________。 (3)H的分子式为C 8 H 6 O 4 ,能与碳酸钠溶液反应放出气体,其一氯代物只有一种,写出E+H→I的反应方程式_________...
【单选题】It is difficult to imagine what life would be like without memory. The meanings of thousands of everyday perceptions, the bases【B1】the decisions we make, and the roots of our habits and skills are to ...
【简答题】以下各空,填写代表本题正确答案的字母(A\B\C\D) 1 Q: What is Emily going to do? 2 Q: What did Emily think life in Santa Fe would be like? 3 Q: What is unique in Santa Fe according to the man? 4 Q: What attracts artists a...
【简答题】Mom makes me eat an apple every day ________ healthy. A. keeps B. is kept C. to keep D. kept 2.After the students learnt the text "Hot Tips for August 2040", the teacher kept them ________________ wha...
【简答题】Section B Directions : There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A), B), C) and D). You ...