5. debates over GM food and earlier studies

A、Google "seminal models of economic activities"

B、Go to the library and look for relevant books on the shelf

C、Locate seminal models from what others mentioned in relevant studies of the topic

D、Search "seminal economic models" as key words from E-database of papers on economics

Fill the blanks to understand the carbons released by driving a car. Consider the carbons that are admitted. Just to get the fuel into the tank. From the energy needed to extract oil from ①_________, pollution caused by ②_________ and refinement to the final ③_________ to your local petro station, not to mention the CO2 released by ④_________ your car in the first place. More than you thought. ①_________

In academic research, important questions rarely have simple answers, so the authors are expected to consider both counterarguments (views that are contrary to his/her own) and counterevidence (evidence that runs counter to the author’s claims). Only when the author admits some legitimacy to counterarguments or counterevidence can s/he show objectivity and fairness. The admission strategy used is concession. Here are several concession statements. Decide which part of the sentence the author concedes (choose from A or B), and whether it is a counterargument (CA) or counterevidence (CE) (choose from C or D).

A、1

B、2

C、CA

D、CE