若图中甲、乙均表示人体生命活动调节过程中细胞之间的信息传递方式，细胞1与2及细胞3与4之间通过某种化学物质直接发生联系．据图所作的下列叙述错误的是（　　）

中国特色社会主义事业是全面发展、全面进步的事业。

修改：在错的词下画一横线，并在该词下面写出修改后的词。

注意：1 每处错误及其修改均仅限一词；

2只允许修改10处，多者(从第11处起)不计分。

Aproverb says, “Time is money.” But in my opinions, time is even much valuablethan money. Why? Because when money is spent, we can earn them back, so whentime is wasted, we can never get it back. There is no doubt when time is verylimiting, and even an hour is of great value. We should make full use of timedo useful things. It's a pity that a lot of people didn't appreciate the valueof time. They waste their time doing anything useful. We should form the goodhabit of racing against the time.

半径2厘米的圆的周长和面积是相等的．

A、y=2^x﹣1；  B、y=2^x﹣1； C、y=﹣2^x；D、y=﹣2^﹣x；E、y=（ $\frac{1}{2}$ ）^x；F、y=（ $\frac{1}{2}$ ）^﹣x