题目

Let your little brother play your toys as well, Alice — you must learn to ______.    A. support        B. spare        C. share        D. care 答案：C如图，要把显微镜视野下的标本从下图中的A转为B，正确的操作步骤是（　　）①移动载玻片         ②调节光圈和反光镜③转动转换器 ④转动细准焦螺旋⑤转动粗准焦螺旋． A、③②⑤④B、②③④⑤C、④③①②D、①③②④