TPO 30
according to some ancient historians, the Greek defended themselves with an ingenious weapon called a "burning mirror", for war with the roman navy. this claim that expressed in the passage is impractical and entirely unconvincing. the first reason, they could do not produce a large flat polished copper because its materials did not exist and we know, a mirror that would focus sunlight with sufficient intensity to set ship on fire would have tobe several meters wide. the second reason, the burning mirror would have to take a long time to set the ships on fire, it approximately take ten minutes time for setting fire so that is not quick enough for attack. therefore, such a weapon would have been very ineffective. the third reason, the Greeks probably were familiar with this weapon but they did burning with flaming arrows but this weapon is effective for a few distance so the Greeks have to produce a better and more effective weapon like burning mirror.
- The golden frog is a small bright yellow amphibian that lives in and around mountain streams in Panama The species is severely endangered because of a fungus that infects the frog through its skin and inhibits the frog s critical life functions such as br 60
- tpo25 40
- The sea otter is a small mammal that lives in waters along the western coast of North America from California to Alaska When some sea otter populations off the Alaskan coast started rapidly declining a few years ago it caused much concern because sea otte 66
- integrated writing toefl, TPO 25 40
- Populations of the yellow cedar, a species of tree that is common in northwestern North America, have been steadily declining for more than a century now, since about 1880. Scientists have advanced several hypotheses explain this decline.One hypothesis is 40