先日のIELTS Voca Bookはまるで「なぞなそ」もしくは、ちょっと論理的な「パックン英検」でした。よかったら、皆さんも挑戦してみてください。
１）The most important part of this object is a strip of two different metals, one on top of the other. As they heat up, both metals expand, but one does it faster than the other. The strip bends and connects with a switch, which turns off the power supply. When the strip cools down, the metals contract and the switch is disconnected.
2）This object has several component parts, most of which are made of plastic. A disc inserted into the object spins quickly. At the same time a thin beam of light strikes the disc and coverts digital symbols into sounds. These sounds can be increased of decreased in volume by means of a button or dial.
3）Liquid and gas are compressed in a hard metal tube. This can be released by pushing or squeezing a button which opens a valve. When the liquid-gas combination leaves the tube and is mixed with oxygen, it rapidly expands.
4）This object is mainly of aulminium. As it moves forward , air flows over two horizontal sections. As it accelerates, a vacumum is formed over the horizontal sections and the object is pulled into the air by the force of this vecuum.