64. Sometimes, the simplest ideas are the best. Forexample, to absorb heat from the sun to heat water,you need large, flat, black surfaces. One way to dothat is to build those surfaces specially, on the roofsof buildings. But why go to all that trouble whencities are full of black surfaces already, in the form ofasphalt (柏油) roads?Ten years ago, this thought came into the mind of Arian de Bondt, a Dutch engineer. He finallypersuaded his boss to follow it up. The result is that their building is now heated in winter andcooled in summer by a system that relies on the surface of the road outside.The heat-collector is a system of connected water pipes. Most of them run from one side of thestreet to the other, just under the asphalt road. Some, however, dive deep into the ground.When the street surface gets hot in summer, water pumped through the pipes picks up thisheat and takes it underground through one of the diving pipes. At a depth of 100 metres lies anatural aquifer (蓄水层) into which several heat exchangers (交换器) have been built. The hotwater from the street runs through these exchangers, warming the ground-water, beforereturning to the surface through another pipe. The aquifer is thus used as a heat store.In winter, the working system is changed slightly. Water is pumped through the heatexchangers to pick up the heat stored during summer. This water goes into the building and isused to warm the place up. After performing that task, it is pumped under the asphalt and itsremaining heat keeps the road free of snow and ice.Which of the following is true according to the first two paragraphs?
(A). Arian de Bondt got his idea from his boss.
(B). Large, flat, black surfaces need to be built in cities.
(C). The Dutch engineer's system has been widely used.
(D). Heat can also be collected from asphalt roads.