图为“探究馒头在口腔中的变化”的实验设计，图中试管均置于37℃温水中10分钟。

How to         computers         us better is an important task.

（A）

School Day Show

Date: March 24

Time: 8:00 am~11:00 am

Place: The school music hall

Rules:

★ Don't bring friends from other schools. If you do, we will let them go.

★ Keep quiet during the show. If you talk loudly, you may disturb(打扰) others.

★ Don't bring food or drinks into the hall.

★ Turn off your mobile phones. If you don't do so, you'll have to leave.

★ Don't smoke. If you do, we will ask you to leave.

    For more information, please call Miss Green at 6557-0023. Or you can click on schoolday.com.cn.

根据如图的信息判断，下列说法正确的是(    )

请结合所学知识，向下列网友提出你的见解与帮助。