A:碳和氧化铜混合高温加热
B:硫酸钾溶液和氯化镁溶液
C:硫酸钠溶液和硝酸铁溶液
D:氢氧化钠溶液和硝酸铁溶液
如图1,我们把对角线互相垂直的四边形叫做垂美四边形.
There are on my father's farm, so we often have some delicious to eat.
一____茶 一____女孩 一____星期天 一____大眼睛
Let's play ______ basketball after school.