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• 1. 1. A pair of mainly refers to "a pair; a pair", which is composed of two parts______ Number form______ It can be singular or plural 2. When the phrase "... A pair (s) of" is used as the subject, the singular and plural forms of the predicate verb should be written in Chinese______ The singular and the plural of 3. The nouns after a pair of can be modified with adjectives, which are often placed before pair________ . This pair of jeans is very good This _____ ______ ______ ______ very good. These two new soft sports shoes are my uncle's The ______ ______ ______ _______ _______ _______ my uncle's.
• 2. What's the simplest fraction of a fraction that expands its numerator by four times and reduces its denominator by four times, which is equal to 24
• 3. When is bamboo a countable noun and an uncountable noun?
• 4. Given that the square of a plus a minus 1 equals 200, then the value of one third of a's Square plus one third of a plus 333 is
• 5. English translation What was the girl doing when she was hit by a car The teacher spent the whole weekend grading the children's papers 3. Miss Lin came to the library to collect information for her thesis He is always ready to help his classmates review their lessons Boys like playing football more than girls 6. Many companies are suffering from a lack of skilled workers The bomb exploded in the crowded street
• 6. In triangle ABC, de ∥ BC ad: DB = 2:1, if the area of trapezoidal dbec is 10cm, the area of triangle ABC can be obtained
• 7. Are two-part words like binoculars plural or singular?
• 8. As shown in the figure, in △ ABC, ab = AC = 12cm, De is the vertical bisector of AB, intersecting AB, AC at D and e respectively. (1) if ∠ C = 70 °, calculate the degree of ∠ BEC; (2) if the perimeter of △ ABC is 30cm, calculate the perimeter of △ BCE
• 9. Plant the seeds in the soil
• 10. Street garden to build a circular flower bed, perimeter is 31.4 meters, in the flower bed around the construction of a 1 meter wide circular path. How much area of this path?
• 11. What are nouns, pronouns, verbs, adjectives, adverbs, prepositions, numerals and articles in English
• 12. In △ ABC, ∠ ACB = 90 °, CD is the height of edge AB, AC = 15, BC = 20, find the length of AD and BD ditto!
• 13. English translation Help me translate these sentences 1.The boys are jumping on the playground. 2.I'm not doing anything at present. 3.Are you having lunch now?
• 14. Given the position of numbers a, B, C on the number axis as shown in the figure, try to simplify | a + C | - | a + B + C | - | B-A | + | B + C | ---------c----b--------0----a--------
• 15. The range of function y = (a ^ x-1) / (a ^ x + 1) (a > 0, and a ≠ 1)
• 16. Judging the parity of function ①y=x·sinx ②y=cos（3/2 π+x） ③y=（（sin2x）/sinx）-2 ④y=√（lg cosx） ⑤y=（（2sinx）+1））/（（2sinx）+1） ⑥y=|sin2x|-x·tanx ⑦y=（cosx（1-sinx））/（1-sinx） ⑧y=lg（tanx+1）/（tanx-1） Where ［ is an odd function, ］ is an even function, ］ is both an odd function and an even function, ］ is neither an odd function nor an even function Fill in the serial number
• 17. Let f (x) = ax ^ 2 + BX + C, and f (1) = - A / 2,3a > 2C > 2B, prove a > 0 and - 3
• 18. The monotone decreasing interval of the function y = LG [(x + 1) (3-x)] is?
• 19. When two numbers with the same sign are added, take the sign of () and add (); when two numbers with different signs are added, take the absolute value () minus the smaller absolute value; () two numbers of () are added to get 0, and a number with 0 is still added to get ()
• 20. Log function monotone interval LG (1 + X / 1-x) monotone interval urgent!