题目

Most people think their time problems are outer, and that they are caused by the telephone, meetings, visitors, and delayed information or decisions. Although these problems often have a bad effete on them, as when people call or drop in, we usually contribute to them. We fail to have calls screened（审查） by a skillful secretary or assistant, or we leave our door open, actually assuring（保证）constant interruptions. In almost all cases, it is possible to influence, if not control, it usually can cause problems, such as, slowness and indecision（犹豫不决）, lack of self血浆、原尿和尿液中都含有的物质是（　　）①大分子蛋白质 ②葡萄糖 ③水 ④无机盐 ⑤尿素A. ③④⑤ B. ①②④⑤ C. ②③④ D. ①②③④