請問為什麼這題的b不能選🥺🥺🙏

課文綜合測驗:25%20H COL COM Henrietta Lacks was an African-American woman who was born on August 1st, 1920, in Virginia. When she was in her late twenties, she was totally unaware there was a lump growing her children motherless. After giving birth to her fifth child in 1950, inside her that would she was diagnosed with cervical cancer. She later died 200g the cancer in 1951. However, before her death, a surgeon had taken a sample of her lump 3 the lack of her consent. To many people's surprise, her cells turned out to be the first immortal human cells ever in a cetta laboratory. Ever since then, scientists av 5 various experiments with her cells in laboratories around the world. Thanks to her cells, some of the most significant advances in medicine have been made possible. In conclusion, we should all feel grateful to her. (8) grimom visve tucu To 200 yd loorfor of og ansbute to 专 diagnose 診斷 1. (A) find (B) letb (C) have (D) leave /D with (C) upon (D) into

求解b小題🙇

9. In Section 9.2.1, we discussed two dependent samples X; and Y; for i = 1,...,n. Suppose o2, and var(Y) = o for all i = 1,...,n. In addition, cov (X, Y) = 0 for ij. Let di = X₁ - Y₁ denote the difference of two samples. that cov(X, Y) = p, var (X₂) = (a) Find the variance of o2 = var(d;). (b) In page 21 of the course slides, we have already provided the formula of S2. Please show that S is an unbiased estimator of o2. That is, E(S²) = 2/1.

11.救一下感恩

(A) [OH]> [H] (B) [H] > [OH ] (C) the water is no longer neutral (D) none of these is correct. 11. A 100.0-mL sample of 0.2 M (CH3)3N (Kb = 5.3 x 105) is titrated with 0.2 M HCI. What is the pH at the equivalence point? (A) 5.4 (B)7.0 (C) 10.3 (D) 3.1 (E) 9.9 17 You have a solution of 0 10 MC5 and 0.10 M Cr0.² You add 0 10 M silver nitrate dropwise into

48題寫這樣可以嗎 解答寫doping

a 第47 至50 題為題組 After Thomas Hicks, an American marathon runner, collapsed right after he won the race in the 1904 Summer Olympics, people found that he didn't rumple because of exhaustion but because of the mixture of egg whites, brandy, and Strychnine, which is now used as an ingredient of Pesticide . This strange incident isállegedly the regson why the 1908 London Olympics forbade athletes to use drugs during the games. T. Doping, however, is nothing new in Olympics . Some of the ancient athletes in Olympics consumed specially-formulated substances to enhance their performance, ranging from herbs, fungi, to royal jelly and testicles. This old problem not only has a long history, but also seems to remain and expand in sports. (More than a hundred Russian athletes are reported to be barred from the 2016 Rio Games as Russians allegedly bribed anti-doping officials to swap their athletes’ urine samples. Though it's difficult to give exact numbers of athletes who use drugs to enhance their performance, according to a study in 2015) about one third of outstanding athletes are involved in doping to some degree. Performance-boosting drugs are not exclusive to Olympians. Any 30-something young man who is into working out in the gym could be taking inabolic steroids from time to time. Though each year, athletes and their trainers find new plans to consume or administer drugs, there is not much change in the types of drugs. The most popular one is anabolic steroids and human growth hormone. Some common drugs can also be used as bogsters, such as asthma medicine and insulin. As anti-doping agencies lay down more and more rigid rules for inspection, athletes come up with smarter ways to handle doping, like a Schemed schedule of using drugs so that their excellence peak émerges before the sports event to avoid being Notorious as doping may sound, the intention to enhance performance is as positive as ápplying technology to sports competition. Perhaps the authorities concerned should rethink the “real spirit” of sports and check which drug or which technology has violated the spirit so as to decide on Consistent and thorough regulations. tested.

大一普化 5.36求解

5.38 9389 信4 5,42 sphere (about 30 Where the temperatu lbove the surface of Earth), >and presSure are 一235C : h gd 交 and 3.00 XX 10 atm, respectively. Calculate the final Volume of the balloon. The temperature ot 2.5 L of a gas initially at SUN increased to 2507”C at constant volume. Calculate the final pressure of the gas in atm. The pressure of 6.0 L of an ideal gas in aflexible contalner 1S decreased to one-third of its original presSure, and 1ts absolute temperature 1s decreased by one-half. What 1s the flnal volume of the gas? A gas evolved during the tfermentation of glucose (wine making) has a volume of 0.78 L when mea- sured at 20.1?C and 1.00 atm. What was the volume of this gas at the fermentation temperature of 36.5 C and 1.00 atm presSure? An ideal gas originally at 0.85 atm and 66”C was allowed to expand until its final Volume, preSSure, and temperature were 94 mL, 0.60 atm, and 45 C, respectively. What was its initial volume? The volume of a gas at STP is 488 mL. Calculate 1ts volume at 22.5 atm and 1507C. A gas at 772 mmHg and 35.0”C Qceuples a Volume of 6.85工. Calculate its volume at STEP. Dry ice is solid carbon dioxide. A 0.050-g sample ot dry ice js placed in an evacuated 4.6-L vessel at 30。C. Caleulate the pressure inside the VesSel after all the dry ice has been conVerted to CO gasS, Avolume of 0.280Lofagas at STP weighs 0.400 g. Calculate the molar mass Of the gas. Aquantity of gas Weighing 7.10g at741tor and 445C oeeupies a volume of 5.40L. What is its molar mass? Si人2 5.93 5.54 Dalt 和Ae0U76 5 5.56

為什麼答案是d 🙏🙏🙏

Which of fhe following would NOT be considered an 旋fe7s/ve p/ope/fy describing an unknown sample? at is asolid at 25”C. bp)蔬has a density of 1.38 g/cm3. C)t melts at 62.0” C. djt has a volume of 0.52 cm3. e湃jS shiny.

請問畫螢光處的句子省略了什麼??

條 0 gbeen debate on Wietlle 2 iiUIOV2 yOU more? Science gemt : There has lon pets. which are more intelll may just have theansWers. cial Cdf5 ~ Dog5: featured on TV spe do. Claremomt odetermine A study more than Cats 7 from the pets betfore MA 8 財 that dogs love people professor Paul Zak loo ked at dogs and cats t 中 7Zak took SalivaA.sampl sters. He fm the samples for The dogs oxytocin人, produced five tlmes jpk Qo none at all. Zak adimi8 change outside ofa ]aboratory、 heard fa .., 1 141... 0計

第24題答案是D請問要怎麼算，有點看不懂

integral multiple of ) reacts with oxygen in theairto Produce carbon dioxide and wafeg 了38.0 grams of carbon dioxide are produced from the reaction of 久.05 gma 1excess Whatis the % yield in this reaction?2 C) 86.4 sample ofammonium carbonate contains C) 0.176 32.0 gcontains

為什麼more 後面是接effectively 而不是effective

Studres have shown that samples increase 和 on-the-spot sales and customer lyalelY 。 more effectively than price discounts? or coupons.”How do you avoid falling for /

為什麼是用is trying 而不是is to try 這句應該不是進行式吧

3 Parttoi iefun trying all the why SUbDernm au,:12 9 Kgrocery shopping is But there's areason 2 1本