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Mathematical yo-yo
Walking on the road of growing up, I suddenly turned around and looked at colorful footprints, with a sweet smile on my face. Friend, it's good to have your company on the road to growth!

It was my friend's birthday. Finish your homework, take carefully selected gifts and prepare to leave. This tripterygium wilfordii really picked the right time to make trouble when I was about to go out. Look, lightning moves from the horizon to the zenith, and thunder moves from far to near. Soon, heavy rain fell from the sky and the dark sky seemed to collapse. Alas, dark clouds covered the sun, raindrops occupied the air, and the strong wind combined with the ticking rain disturbed my mood. The moment I turned on the TV, I thought, that's it. Nobody wants to go in such a heavy rain.

My mobile phone rang before I finished watching an episode of Detective Conan. Before I could speak, my friend's anxious voice came: "Are you on the road? Did you get wet in the rain? " I faltered in shame and made an excuse: I caught a cold and pretended to cough a few times. When she knew, she asked, "Where are your parents?" "I have something to do." "Then drink more water." Then hung up the phone.

It is true that mom and dad are not at home. I am free, nobody cares about watching TV, but I am helpless. No, I growl when I'm hungry, but there's only one bread left in the fridge. I eat bread while watching TV. Finally saw the most critical plot. The terrible and gloomy crime scene gives me the creeps. I feel my blood boiling all over, and my heart is pounding in my chest, as if to fly. Ding, the doorbell rang suddenly, and the midnight bell rang! I suddenly remembered the word. I trembled with fear, shaking like chaff, and my face was as white as a cucumber. I slowly moved to the door, my ear stuck to the door, and my friend's anxious call came from outside. I opened the door with tears streaming down my face. I was shocked to see her standing so straight in front of me. The whole face was flushed with wind, and water was dripping on it. My wet hair clung to my face, and I was clutching a plastic bag while my raincoat was dripping. What a mess.

My nose is suddenly sour, and I have an unspeakable feeling in my heart. I quickly pulled her in, and before I could get the dry towel, she grabbed me excitedly and opened the plastic bag. I was shocked. There is a birthday cake and even a box of cold medicine in it. At that moment, my heart swelled like a mirror-flat lake, with layers of microwaves, and my heart was full of gratitude. This night, I felt the most sincere care of my friends and my heart was warm. But where did she know that the cold was just an excuse for me not to attend her birthday party in the rain, but she took it for granted and rushed over in the pouring rain. My heart seems to be pierced by thousands of steel needles, and my throat seems to be blocked by something. I feel extremely sad and ashamed. Finally, I couldn't help crying with her. After a while, a picture appeared: a pair of sister flowers, hugging together to watch TV and eat cake, warm and sweet.

I was really glad to have such a friend when I was growing up. When I was in trouble, she extended a helping hand; When I am depressed, she makes me happy; She encouraged me when I was disappointed and helpless. She is like a flower, blooming on my growth path, which makes my growth path full of laughter. Friend, it's good to have you!