题目

Do you want to live with a strong sense of peacefulness, happiness, goodness, and self-respect? The collection of happiness actions broadly categorized(把…归类) as honor help you create this life of good feelings.    Here's an example to show how honorable actions create happiness.    Say a store clerk fails to charge us for an item. If we keep silent, and profit from the clerk's mistake, we would drive home with a sense of sneaky(卑鄙的) excitement. Later we might tell our family or friends about our good fortune. On the other hand, if we tell the clerk about the uncharged人眼和借助光学仪器对细小物体的分辨说法中正确的是 [　　] A．人眼能直接看清大小为0.1mm的物体，如一根头发 B．用放大镜能看清约1mm的物体，如原子 C．用显微镜能看清约为1um的物体，如细菌 D．用电子显微镜能看清比普通显微镜小1000倍的物体