The use of prepositions in the classroom

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• 1. Ad is the middle line of triangle ABC, AE is vertical AB, AF is vertical AC, and AE = AB, AF = AC, connect EF, verify: ad = 2 / 1ef
• 2. I is the inner part of triangle ABC, ID is perpendicular to BC and CI extension line AB intersects with E
• 3. Make the following words plural 1.a piece of beef 2.a cup of tea 3.a bottle of juice 4.a box of glass
• 4. Change the following words into plural Man family this it she he ruler box knife woman dictionary is that am is.no ,it isn’t.this photo is very good.is She your pen friend
• 5. Write the plural of the following words jeep map name number pen eraser brother grade row bird ruler friend cat sister pear dog student phone clock desk mouse It's plural
• 6. Write the plural of the following words (1)this_____ (2)that____ (3)he/she_____ (6)friend_____
• 7. The plural of the following English words 1、book 2、box 3、dress 4、orange 5、foot 6、tooth 7、bag 8、baby 9、man
• 8. Can I use the plural noun before the plural noun? Some people insist that children should learn something besides the subjects in schools. Can I use the plural noun in this sentence?
• 9. English words describing horses Like the title, It's descriptive! A little more
• 10. Questions about the singular and plural of English words, The first question: it's about words with the same singular and plural, such as works factory, and species. In other words, it can be written as follows: a works / many works a factory / many factories a species / many species a species / many species Second question: a pair of pants are green / a pair of pants is green, which one is right? Are panels identical? Since boot is identical, why is there a pair of boots I've forgotten the singular and plural
• 11. X minus one twelfth minus five twelfth equals one fourth
• 12. Piano ends with O. why does it add s when it becomes plural? Does it belong to the case that the ending is vowel + O?
• 13. The sum of numerator and denominator of a fraction is 47. If 9 is subtracted from denominator, the fraction is equal to 1. What is the original fraction?
• 14. The difference between trousers and pants in English Tell the difference between trousers and pants in English,
• 15. Please write down the meaning of this abbreviation: CBA__________
• 16. What's the difference between the use of past participles as postpositive attributives and passive voice! A:What are on show in the museum B: Some pictures (draw / were draw) by the Africans
• 17. In △ ABC, ∠ ACB = 90, CD is the height of edge AB, AC = 15, BC = 20, find the length of AD and BD
• 18. Ten English questions in the present continuous tense Please change the following verbs to the correct form of the present progressive (note that sometimes it's the third person singular) 1. The phone ____ . Please answer it. (ring) 2. Look! Your baby _____ . (smile) 3. Listen! Somebody ____ in the next room. (sing) 4. Mr Smith _____ a book now. (read) 5. The Smiths ______ TV now. (watch) 6. Joyce and Joseph _____ a car now. (push) 7. A girl and her friends ____ tea at the moment. (drink) 8. Slow the car down. You ____ too fast. (drive) 9. We ____ to plan our holiday now. (begin) 10. The woman ____ a novel these days. (write)
• 19. Given ax ^ 4 + BX ^ 3 + CX ^ 2 + DX + e = (X-2) ^ 4, find the value of a + B + C + D + E and the value of a + C
• 20. Given the position of ABC on the number axis, as shown in the figure below, simplify a / | ab | + 1 / | B | - 2BC / | BC| Figure: a-b-0-c