题目内容
在PHP中，析构方法的名称是__destruct()，并且不能有任何参数。
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类常量使用define()函数定义。
符号“::”被称为静态访问符，访问静态成员都需要通过这个操作符来完成。
类常量不能用public，protected，private，static修饰
Dictation: listen to the audio and fill in the blanks.[音频]Water from the Sky: Too Much or Not Enough?"How much rain did we get?" It's a question we often hear, and its an important one because all life on Earth depends on (1) ___________. As long as our part of the world gets the usual (2) ____________ of rain, we're happy.The problems come when we get too much rainfall or not enough. In southern China, for example, June of 2016 was a month of (3) ____________that brought far too much rain. The rain caused (4) ____________in much of the area. Three hundred people were killed, and 700,000 acres of farmland were underwater.That same spring, very little rain fell in parts of India. That caused a (5) ______________in the state of Telangana. The terrible conditions (6) _____________food crops, which couldn't grow without water. Drinking water supplies dried up as well. More than a quarter of India's population was affected.The problems are different when the (7) _____________is cold. Then it's the amount of snowfall that matters. In February of 2016, a huge snowstorm hit the resort island of Jeju in South Korea. It was the biggest snowfall there in several decades.Because rainfall is so important to us, scientists called meteorologists try to (8) _____________the amount of rainfall different parts of the worid will receive. To do this, they (9) _____________air and ocean temperatures. They also watch weather conditions around the world to see how the air is moving.Meteorologists then make weather (10) _______________to let us know how much rain to expect. They're not always exactly right, but they do know when well probably have large amounts of rain or not enough.
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