表示
The entire structure cost more than $2.5 million to build at the time.
The entire structure cost more than $2.5 million to build at the time.
He has come to work for a local newspaper about ten years ago, when he graduated from Peking University.
He has come to work for a local newspaper about ten years ago, when he graduated from Peking University.
D的化学式是____,D溶液显碱性的原因是(用离子方程式表示)____.
D的化学式是\_\_\_\_,D溶液显碱性的原因是(用离子方程式表示)\_\_\_\_.
There were a _____ number of students on the playground.
There were a \_\_\_\__ number of students on the playground.
小苏打可用于治疗胃酸(主要成分是盐酸)过多,其原因是(用化学方程式表示) ____.
小苏打可用于治疗胃酸(主要成分是盐酸)过多,其原因是(用化学方程式表示) \_\_\_\_.
熟石灰常用作建筑材料,因为其吸收二氧化碳会变成坚固的____(用化学式表示).
熟石灰常用作建筑材料,因为其吸收二氧化碳会变成坚固的\_\_\_\_(用化学式表示).
生石灰常用作食品干燥剂,其原因是(用化学方程式表示)____.
生石灰常用作食品干燥剂,其原因是(用化学方程式表示)\_\_\_\_.