题目

根据短文内容选择正确答案。Strange things happen when you travel, because the earth is divided into twenty-four zones (区). The time difference between two zones is one hour. You can have days with more than twenty-four hours and days with fewer than twenty-four hours. You can have weeks with more than seven days and weeks with fewer than seven days.If you make a five-day trip across the Atlantic Ocean (大西洋),your ship comes into a differenttime zone（时区） every day. As you come into each zone, the time changes one hour. If you travel west, you set your watch back. If y8．如图是肾单位结构模式图，a、b表示生理过程，①-⑥表示结构，请据图回答：（1）血液从[②]肾小球滤过到[④]肾小囊成为原尿．（2）与①内液体相比，④内液体不含血细胞和大分子蛋白质．（3）与原尿相比，尿中不含葡萄糖，因为[b]肾小管的重吸收作用，它能将大部分的水、部分无机盐和全部的葡萄糖吸收回血液．（4）图中流动脉血的结构序号是①②③，流静脉血的序号是⑥．（5）⑥比①减少的物有尿素和氧气．