常用的绝热材料按材质可分为（）类绝热材料。 A.有机与无机 B._爱下问搜题

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问题单项选择题

常用的绝热材料按材质可分为（）类绝热材料。

A.有机与无机

B.有机、无机与金属

C.多孔与少孔

D.成膜状与颗粒状

答案

参考答案：D

填空题

Questions 9-13

·You will hearfive speakers talking about advantages or disadvantages about cloning.
·For questions 9-13, choose from the list A-F which advantage or disadvantage they are talking about.
·Use the letters only once. There is one extra letter which you do not need to use.
9. Speaker 1: ______
10. Speaker 2: ______
11. Speaker 3: ______
12. Speaker 4: ______
13. Speaker 5: ______

A. The element of uncertainty
B. Reverse the aging process
C. Helping infertile couples
D. Potential benefits to modern medicine
E. Improving food supply
F. The potential for abuse

单项选择题

张元幹《贺新郎》有“连营画角，故宫离黍”一句中，离黍一词的确切解释是：（）

A.本意为离开故乡

B.本意为离开宫殿

C.本意为庄稼行列整齐

D.本意为宫廷中的花木