A When enzymes can be commonly found in living ceils.
C When the technology of a new type of fuel cell is suitable for mass production.
2. What trouble did Minteer and Klotzhach have in their research?
B They had trouble keeping biological cells active.
D They had trouble finding mechanism for producing enzymes.
A when bags of enzyme are embedded in the new fuel cell.
C when the enzyme oxidizes the glucose from a sugary liquid that goes through
D when the enzyme oxidizes the sugary liquid that goes through a pocket.
A Their limitless power generation capacity is amazing.
C Their limited power generation capacity is the result of great efforts.
5. According to the last paragraph,what is NOT true of the new fuel cells?
B The new fuel cells are environment friendly.
D It will take some time before the new fuel cells can be used in popular products.
1. C 2. A 3. C 4. B 5. D
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