题目: —What kind of soup would you like?—_______ and _______ soup.A. Tomatos, eggsB. Tomatoes, egg C. Tomato, egg D. Tomatoes, eggs 答案: 答案:C
题型:问答题 如图所示,用导线将验电器与洁净锌板连接,触摸锌板使验电器指示归零.用紫外线照射锌板,验电器指针发生明显偏转,接着用毛皮摩擦过的橡胶棒接触锌板,发现验电器指针张角减小,此现象说明锌板带______电(选填写“正”或“负”);若改用红外线重复上实验,结果发现验电器指针根本不会发生偏转,说明金属锌的极限频率______红外线(选填“大于”或“小于”). 查看答案