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btsphamthuy1306
2 năm trước
Tại sao AaBb lại cho 4 loại giao tử AB, Ab, aB, ăn Mình chỉ hiểu có 4 loại là A, a, B, b thôi. Khó hiểu quá. Giúp mình với
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C. READING I. Read the following passage and choose the item (A, B, C or D) that best answers each of the questions about it. HOW TO USE BICYCLE 1. Don‟t ride a bicycle which is not the right size for you. 2. Check a bicycle before using it and make sure that the brakes and steering-wheel work properly and the tyres have enough air in them. 3. When riding a bicycle, always use a cycling track at the side of the road when there is one. 4. Don‟t ride too fast, especially when going down hills and turning corner. 5. Control the speed of your bicycle with your brakes, but always use them gently. 6. When in a group, always ride in single file. 7. Always keep to the side of the road, do not ride in the middle of the road or weave back and forth on the road. 1. You should ride a bicycle which is . A. higher than you are C. your right size B. with high seat D. your favorite 2. Which part of a bicycle is used for changing direction? A. The front wheel C. The tyres B. The back wheel D. The steering wheel 3. When is the most dangerous to ride fast? A. When riding along the roads C. When going down hills B. When turning corner D. B and C are right 4. Which part of a bicycle do you use to control the speed? A. The brake C. The chains B. The lights D. None of the above 5. When you are in a hurry you can . A. ride in the middle of the road B. weave back and forth C. ride dangerously D. ride in a cycling track quickly LÀM VÀ GIẢI THÍCH HỘ MIK VS MIK CẢM ƠN ( NHỚ GIẢI THÍCH ĐẤY )

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