——Where is your father?——He_________ Australia and he ________ Sydney for two weeks.
A:has been to; has been in
B:has gone to ; has been in
C:has been in; has been to
D:has gone to ; has been to
如表是一个健康人的血浆、原尿、尿液的三个样品中主要物质含量表(单位:克/100毫升)如图为一个肾单位结构模式图(甲、乙表示过程,1~5表示结构).据图、表回答问题:
物质
样本A
样本B
样本C
葡萄糖
0.1
0
无机盐
0.9
1.1
蛋白质
微量
7.5
尿素
0.03
1.8
下列有关我国各民族的地区分布状况的描述,正确的是( )