A:He was sweeping the floor.
B:He was doing the dishes.
C:He was folding his clothes.
下列关于溶液的说法中,正确的是( )
已知点px,3是角θ终边上一点,且cosθ=-45,则x的值为( )
医生在检测某正常人血浆、原尿、尿液三种液体时,发现甲、乙两种物质的含量如表(克/10毫升).试分析判断甲、乙分别是( )
血浆
原尿
尿液
甲
0.03
1.8
乙
7.2
微量
0