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buyeu123
2 năm trước
Một vệ tinh nhân tạo quay tròn đều quanh Trái đất trên mặt phẳng xích đạo và cùng chiều tự quay của Trái đất. Cứ sau 6h, người ta lại thấy nó bay qua đỉnh của một trạm quan sát nằm trên xích đạo. Tính chu kỳ quay của vệ tinh. Mình đang cần gấp !!
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Các câu hỏi liên quan

1. Put the verbs in brackets into the correct tense. 1. A: I ... (meet) Simon Jones last week. B: Really. I ... (not/see) him for a long time. 2. A: ... (you/do) anything this evening ? B: No, I ... (stay) at home this evening because I ...(be) tidied. 3. A: ... (Steve/phone) you yesterday? B: No, he ... (not/phone) me. I ... (probably/give) him a call later this evening. 4. A: ...(be) yo busy? B: Yes, I ... (be) A: What ... (you/do)? B: I ... (study) for an exam at the moment. 5. A:Why are your eyes red? B: Because I ...(work) on the computer for three hours. 6. A: ... (you/ever/go) to France? B: Yes, I ... (go) there on holiday year. A: I ... (never/go) there, but I want to go next year. 7. A: How long ... (you/live) in Russia? B: I ... (live) here since I was born. 8. A: ... (you/post) the party invitation yet? B: Yes, I ... (do) is this morning. 9.A: Why are you crying? B: Because I ... (just/cut) my finger.

1. Find the adjective in the first sentence and fill in the blanks with the corresponding adverb. James is careful. He drives____________. The girl is slow. She walks____________. Her English is perfect. She speaks English____________. Our teacher is angry. She shouts____________. My neighbor is a loud speaker. He speaks____________. He is a bad writer. He writes____________. Jane is a nice guitar player. He plays the guitar____________. He is a good painter. He paints____________. She is a quiet girl. She does her job____________. This exercise is easy. You can do it____________. 5. Complete the sentence using an adjective or adverb. He's always in a rush. I don't understand why he walks so ____________ (quick/quickly). I prefer studying in the library. It's always_______________ (quiet/quietly). Michael __________ (happy/happily) took the assistant job. He had been looking for a position all summer. Marta dances _____________ (beautiful/beautifully). She's been taking ballet since she was five years old. They speak French very ____________ (good/well). They lived in France for two years. My neighbor always plays ___________ (loud/loudly) music on the weekends. It's so annoying. Please be __________ (careful/carefully) in the hallway. The walls have just been painted. Dan is very smart, but he is not a very___________ (good/well) student. He reacted __________ (angry/angrily) to the news. I have never seen him so upset. We didn't ______________ (complete/completely) understand the teacher's instructions. Most of us did not finish the assignment.

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