问题
填空题
毛细管半径越小,两相密度差越小,界面张力越大,则毛细管上升高度越()。
答案
参考答案:大
毛细管半径越小,两相密度差越小,界面张力越大,则毛细管上升高度越()。
参考答案:大
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____________. |