如果作用在气块上的重力与静压力保持严格的平衡，气块的垂直加速度为零，则这种大气平衡状

由一种阳离子与两种酸根离子组成的盐称为混盐。混盐CaOCl₂在酸性条件下可以产生氯气。该混盐 （        ）

A．水溶液呈中性

B．与硫酸反应产生1mol氯气时转移2mol电子

C．水溶液不能使淀粉-KI试纸变蓝

D．既含离子键又含共价键

在《探究小车速度随时间变化的规律》实验中，将下列步骤的代号按合理顺序填写在横线上：______

A．将小车移至靠近打点计时器处，先接通电源，后放开纸带

B．将打点计时器固定在平板上，并接好电路

C．把一条细绳拴在小车上，细绳跨过定滑轮，下面吊着重量适当的钩码

D．断开电源，取下纸带

E．将纸带固定在小车尾部，并穿过打点计时器的限位孔

F．换上新的纸带，再重复做三次．

李老师带了43个同学去西湖划船，共租了9条船，每条大船坐6人，每条小船坐4人，大船有______条，小船有______条．

It was definitely true that Shanghai saw itself as a trendsetter back in the 1930s when anything that became popular in Shanghai would reach out and influence the entire Far East. But now, Shanghai is gradually losing that power.

Topic: Can Shanghai regain its power as a trendsetter

Questions for Reference:
1. Many young people don’t understand their roots and what is special about Shanghai culture. They just copy westerners. Why
2. Things made in other places are seen more often than things made in Shanghai. What are the possible reasons for this
3. What can the city do to regain its status

在烹调中，调具体起什么作用？