题目

When I find a millipede insect，I rub it over my body.It ________ a powerful drug which ________ mosquitoes. A．contains；effects                     B．includes；effects C．contains；affects                     D．includes；efforts 答案：Ｃ相同质量的镁、铝、锌、铁四种金属，分别与足量的稀盐酸反应，下列图像中，能正确反映产生氢气质量和反应速率之间关系的是A. A B. B C. C D. D