题目

Melbourne is in Australia. It is a beautiful city【1】huge gardens, great parks and many【2】(amaze) buildings. Many people came to visit it every year.Melbourne is also【3】 ancient city in Australia. It has an interesting history of more than 170 years. The first people came in 1835,and in the 1850s,gold 【4】(discover). Because of this, Melbourne became a very rich city. Many new buildings were built at that time.And today, Melbourne is one of the world’s 【5】(great) cities. It is known 【6】 its 【7】 (beautiful) and its famous universities. It is also Australia’s top ci如图所示，按要求连接实物图．要求L1与L2并联，用滑动变阻器只能控制L2的亮度，开关能同时控制两盏灯．