Great Scientists教案

   the boat is "solar-assisted" rather than "solar-driven" because it has a battery charger (電池充電器) which is built into the boat. it can help power the boat when the solar panels do not collect enough energy.   monte gisbome talked about the boat in an interview. "the problem with technology these days is that it produces too much heat and too little energy for motion. my boat is at least eight times more efficient than a gas-powered boat, which means that it saves me a lot of money and keeps the environment clean. even in these technologically advanced times, some of the more popular gas-powered boats are terribly inefficient, which means that they cost a lot of money to use every day, and they make the water very dirty."   he also mentioned that the solar panels can provide the boat with about 16 km of free travel on a sunny day. "for most customers, 16 km is enough and," monte gisborne said, "even if you travel 32 km in one day, as long as you don't use it the next day, you have nothing to worry about because the battery won't run out of power."    for this reason, these boats are perfect toys for weekend use but not much more than that. it' s best to leave them in the sun during the week to let the battery charge and then use them on weekends. in other words, if you need to use a boat every day you may still need to use a gas-powered boat.41. from the passage, we can learn that ______________.    a. the loon was the first solar-powered boat to set sail in america    b. the loon gets all its electricity from the sun via solar panels    c. tamarack lake electric boat company designed the first solar-powered boat    d. gisborne first designed the solar panels for the boat42. what does gusborne think is the best part of his boat?    a. it is almost as fast as other boats.    b. it only needs to use energy from water.    c. it uses energy more efficiently.    d. its battery charges quickly.43. what is the shortcoming of the solar-powered boat?    a. it is not very good for everyday use.    b. it is not environmentally friendly.    c. it is not as fast as gas-powered boats.    d. it is too slow for people who use boats a lot.44. what can we infer about the solar-powered electric boats from the last paragraph?    a. they can meet the needs of fishermen.