问题
填空题
核反应按入射粒子种类,可以分为()、()和()。
答案
参考答案:中子核反应;荷电粒子核反应;光核反应
核反应按入射粒子种类,可以分为()、()和()。
参考答案:中子核反应;荷电粒子核反应;光核反应
Travel is useful to us in at least three ways . First, by traveling, we can enjoy the beautiful scenery of different places. We can see with our own eyes many places which can be read about in books, and visit some famous cities and scenic spots (风景区). Second, we will meet people with different interests and see strange and different things. We can get ideas of the conditions and customs of other people , taste different foods and local flavors (风味) if we like. In this way, we can understand how differently other people live. Third, travel will not only help us to gain knowledge of geography and history and other knowledge, but will also help us keep healthy and make us less narrow minded. With all these advantages of travel, it is no wonder that travel has now become more popular than ever in China. 任务型阅读:根据短文内容,填写下列表格。
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