2、The word “synergy” means（ ）based on its etymological explanation.
反感
协同作用
无用功
有效能量
答案: 协同作用
3、The word “oil” originally means “any kind of smooth greasy liquid” but later acquires the specific meaning of “petroleum”. This word-forming method is called（ ）.
Generalization
Specialization
Extension
Specification
答案: Specialization
4、Compounded words have four characteristics, among which（ ）refers to its spelling features.
grammatical
semantic
phonological
orthographical
答案: orthographical
5、Sour oil means oil that contains a relatively high proportion of（ ）.
sulfur
carbon
hydrogen
oxygen
答案: sulfur
6、The sun energizes photosynthesis and brings about the energy called（ ）.
physical energy
chemical energy
kinetic energy
geothermal energy
答案: chemical energy
7、Energy industry is the totality of all of the industries involved in the production and sale of energy, including fuel extraction, manufacturing,（ ）and distribution.
refining
defining
retailing
decomposing
答案: refining
8、The underlined word “tap” means（ ）in the following sentence—Oil is formed and then percolates up through cracks and porous rock to fill the reservoirs that humanstap to get oil.
敲打
轻拍
利用
开采
答案: 开采
9、Abbreviations can achieve brevity, conciseness, efficiency and economy. Therefore it is frequently used in the following domain EXCEPT（ ）.
