问题
单项选择题
挥发分在10%~20%的煤称为（）
A.烟煤
B.无烟煤
C.褐煤
D.贫煤
答案
参考答案：D
搜题请搜索小程序“爱下问搜题”
挥发分在10%~20%的煤称为（）
A.烟煤
B.无烟煤
C.褐煤
D.贫煤
参考答案：D
| 选择方框中的词完成短文。 | |
2____________, her 3____________ and Helen. Her grandfather is a worker. He is tall. Her grandmother is a nurse. She is 4____________. Her father is a taxi-driver. He is thin. Her mother is a 5____________. |