关于该实验有以下说法:
①若溶液甲呈浅绿色,则原黑色固体粉末中一定含有 Fe;
②若步骤Ⅱ中无明显现象,则固体乙中最多只能 有四种物质;
③若步骤Ⅱ中 有气泡产生,则原固体可能是纯净物也可能是混合物;
④若步骤Ⅱ中有红色固体析出,则固体乙中一定无 CuO;
⑤固 体乙呈红色,则原固体中一定含有 Fe 和 CuO。 以上说法中符合题意的个数是( )
A:1 个
B:2 个
C:3 个
D:4 个
We usually have three meals. We have breakfast, lunch and supper. We often have more time for lunch and supper, and we eat a big lunch or supper. But a good breakfast is very important (重要的). It's easy for you to understand it. You don’t eat anything for about twelve hours from the last (上次) supper. One good breakfast should be rice or bread, an egg and milk. On a cold morning a cup of hot drink is necessary (必需的). Get up a little early and you can have enough time to eat breakfast. A good breakfast helps you to study well. It helps you to work well and play happily. You will be fun for a day after you enjoy a good breakfast.
当你想告诉别人这是你的英语老师时,你应说( )