想問圈起來的三個地方，為什麼要這樣除，看不太懂，不是算球體積和立方體積而已嗎？

atoms unit cell volume 4 atom - Tł ( y a 3 3 AC a3 volume unit cell

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Iculate the pm). (a) density of aluminum metal. 12.40 An element crystallizes in a face-centered cubic lattice. The edge of the unit cell is 0.408 nm, and the density of the crys- tal is 10.49 g/cm3. Calculate the atomic weight of the ele- Islom ment and identify the element. .

請問第17題

第 16 至20 題為題組 The fruits and vegetables we eat often come in distinctive colors. The rich colors, 16 are not there only to attract attention. They perform another important function for the plants. Research shows that the substances 17 these colors actually protect plants from chemical damage. The colors come mainly from chemicals known as antioxidants. Plants make antioxidants to protect themselves from the sun's ultraviolet (UV) light, 18 may cause harmful elements to form within the plant cells. When we eat colorful fruits and vegetables, the coloring chemicals protect us, too. Typically, an intensely colored plant has 19 of these protective chemicals than a paler one does. Research on how chemicals in blueberries affect brain function even suggests that these chemicals may help our own brains work more 20 In other words, eating richly colored fruits and vegetables makes us both healthier and smarter. 16. (A) almost (B) rarely (C) however (D) relatively 17. (A) capable of (B) different from (C) inferior to (D) responsible for

16D跟43B矛盾

終閃釣才友和? 他滲混 人2)7 航務吃用人肯效弦有多胸導

為什麼T細胞要先將CD4 cell 及 CD8 cell 先移除才能執行免疫反應？

有人可以講解一下去年的諾貝爾生物醫學獎嗎 免疫療法

求解，謝謝∼

放 人生 2 【史 說倫- -/ 人0 (31~34) 和 卻 Peter wenttoa winter camp last week. There he met many students of his age 生om different sechools- They learned facts about 人he earth and ar Wat and noise pollution damaged the earth and people. They also learned how to make better use Of garpbage。 Besides, they thought of slogans for SavVing the earth Then they had the slogans printed on the stickers and gave them to people on streets; They hoped the StIekeres, would remind people to do something good for the earth 上 After the camp, Peter told everyone about what he had learned and asked them to help stop the DOIIGIOH | He believed that everyone, even a teenager like him could do alittle every day to make the earth bette 悅 亡 pollution 汙染;slogan 標語;print列印, 品 3 3人 交 )31 What does damaged mean in the 全 本 (ATo save. (B) To help. (CO To hold. ( - )22Which might NOT be 品 生 v (A) fxercise More, Live Longer. (B) Light Of When You Out. (C Bicycle : Its Good for 也,

為什麼35題的A選項是專一性防禦？

立專一性防禦能有 人 ! , 3和4 下列有關胸腺的敘述, 多才人 Re (食飼於胸腔內心臟的上方 ( 5 2記 2 4 月 培細胞CCUD)蝦擬反應舉台 7 2 的場所 (論著 訪 AA AM 說7 (4A)姜面具抗原片段的否噬 細胞 人包)固助T 細胞把毒T 細胞 砰*a ‧ /放56遇閃永和六體的敘述下列何者正確 ? (諒原是指能引起專一性免疫反應的物質 和 抗 原僅存於病原4