潜性酸度_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题名词解释

潜性酸度

答案

参考答案：

指土壤中交换性氢离子、铝离子、羟基铝离子被交换进入溶液后引起的酸度，以100g烘干土中H+的摩尔数表示，包括交换酸和水解酸。

单项选择题

Questions 14-23

·Look at the ten statements for this part.
·You will hear a story about communication through time.
·Decide whether you think each statement is right(R), wrong(W) or not mentioned(NM).
·You will listen to it twice.
·Mark your answers on the Answer Sheet.

As Andrew had a flat tire on the way be asked for a lift to go back home.

A．Right

B．Wrong

C．Not Mentioned

问答题简答题

焊件的焊后变形与坡口的关系如何？