年級

問題的種類

化學 高中

求詳解 謝謝謝謝

年級:一組別:110-118科目名稱:化學 17~18為超級題 下面的兩個相圖中有一個為水,另一個則為二氧化碳,請先判斷後,再回答下列問題; (02 力 力 (atm) (atm) 臨界點 73. 固類 液態 5.2 E A • B 溫度(℃) -18-57 31溫度(℃) 7、下列關於二氧化碳的敘述,何者正確? (A)乾冰熔化時,體積會有膨脹的現象 (B)增加壓力會使液態二氧化碳沸點上升、熔點下降 (C)E點為二氧化碳的三相點,在此點可觀察到固、液、氯三態共存 (D)F點為二氧化碳的臨界點,當溫度、壓力大於此點時可成為超臨界流體 (E)常溫(25°C)、常壓(1am)下,對二氧化碳氣體加壓至70 atm可得到乾冰 18. 下列關於水相圖的敘述,何者正確? (A)當溫度大於-S7℃、壓力大於52am詩,即可成為H.C(a) 低氣壓 (B)若壓力愈大,液態水存在的溫度範圍愈大 (C)由图可知在高山上烹煮食物能較快煮熟 (D)若壓力升高,水的凝固點、沸點上升 19-20為題組題 (E)由A點至B點體積會膨脹,是因粒子數變多 層析是分離混合物的一種簡便方法。其中以薄層層析(TLC)矽膠片作為固定相者,稱為薄層層析法。常見操作 步驟如下圖:首先用鉛筆在 TLC片上,距上、下綠適當距離處(約0.5公分)各劃一條細線,然後用毛細管 點好樣品後,再放入裝有適當展開液之展開槽中進行分部。實驗結束後,科學家們常會使用比移植(Re值, retention factor value)進行結果分析,它的計算方式是利用各呈色點的中心位置移動距離為分子,展開劑移動 距離為分母所得到的一個比值,R值為該化合物於此展開劑的特性,可藉此與他人比較、判斷物質的種類。 展開 7.2 8.4 甲 Solvent front 19. 下列有關於此實驗操作流程的敘述,何者正確? (A) 滴到TLC片起始線上的液滴大小不會影響實驗結果 B (B)若使用易揮發溶劑進行層析,需準備一密閉式容器,以免溶劑揮發影響實驗結果 (C)將物質甲移至所設定的終點線後即可將TLC片取出並記錄時間 (D)點樣前劃線的筆改為水性原子筆,可使跑片後的結果更加清晰 (E)點樣時,應使用毛細管點在起始線下方,不可高於起始線 20.根據上述文章與實驗結果判斷下列敘述,何者正確? (A)此混合物是由甲、乙兩種純物質所構成 (B)物質乙的R值約為0.17·代表其與展開劑溶解度較差 (C)物質甲的R:值約為0.42,此值不會因展開劑移動距離而改變 | Baseline (D)TLC片是籍由毛細現象將燒杯內的展開劑吸附至濾紙上方 (EY 層析法是利用混合物中各成分物質之端點不同而分離 二、多選題(每題4分,共40分,錯1個選項得2.4分,錯2個選項得0.8分,錯3個選項以上及未作答者得0分) 21. 下列哪些物質在常温、常壓下加熱時會發生昇您的現象? 2018 (A) 汞(B)(C)乾冰(D)茶丸(E)碳酸鈣 CD.B Kr 18 8114

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英文 國中

想請問我理解錯了嗎?文章寫前三 但最下面那個是fifth🤔

(30~32) Joyce's latest music video Hold It Up has been uploaded for a year, but it has only got around forty million views, which isn't even a quarter of her best yet. That makes this MV the least popular of all Joyce's music videos. Many of the viewers think the song is good, but it says nothing new. The dance is too difficult, so it is not easy for children to follow. Some say the video looks boring and cheap, but in fact, we spent the most on it. Others even say Joyce has grown a little too old for this children's MV, and honestly, I agree with them. However, Joyce is a very popular star. We'd better work out something new quickly, or the star may stop working with us soon. Here I summarize the reviews of Joyce s Top 3 MVs before Hold It UP, hoping they can help us with Joyce's new MV. In My Dream This is Joyce's third MV. The dance moves look funny and easy to learn. The story in the video has funny moments that make children laugh and want to play it over and over, so it has the second-highest views. ● • Getting Better This is Joyce s best MV. It reached about two hundred million views in one year. The story in the video works well with the lines. Older children feel the song speaks about how they feel and what they think, while younger children can sing along and dance to the music. • In a Candy Store a This is Joyce fifth MV, which was uploaded two years ago. Though she doesn't sing or dance in front of the camera, the video still got over a hundred million views in one year. Many viewers say watching the narrative MV is like enjoying a four-minute movie in which Joyce also plays a part. view(er)觀看(者) summarize review while narrative # 357 ABC 晴天 G

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英文 高中

想問問為什麼42題會要選a?

BALO C 共7頁 Two professors at the University of California at Berkeley hoped to find out the answer. They investigated a pool of 12,000 Japanese men equally divided into three groups: One group had lived in Japan for all their lives, and the other two groups had emigrated to Hawaii or Northern California. It was found that the rate of heart disease among Japanese men increased five times in California and about half of that for those in Hawaii. The study shows that the need to bond with a social group is so fundamental to humans that it remains the key determinant of whether we stay healthy or get ill, even whether we live or die. We need to feel part of something bigger to thrive. We need to belong, not online, but in the real world of nugs, hangsmants, and pats un the back. What is the best title of this passage? (A) Heart Diseases and Their Causes (C) Differences in Japanese Americans Which of the following is a finding of the two American professors' study? (A) Many Japanese men that lived up to 100 years were smokers. (B) Those who often ate hamburgers and fries were more likely to fall sick. (C) Japanese immigrants to America usually formed a tight-knit community. (D) Westernized social life was related to the heart-attack rate of Japanese Americans. Which of the following is an example of "something bigger" in the last paragraph? (A) A family t (B) A stadium. (C) The universe. ACK! 103 年指考 英文考科 The differences could not be explained by any of the usual risk factors for heart disease, such as smoking, high blood pressure, or cholesterol counts. The change in diet, from sushi to hamburgers and fries, was also not related to the rise in heart disease. However, the kind of society they had created for themselves in their new home country was. The most traditional group of Japanese Americans, who maintained/tight-knit and mutually supportive social groups, had a heart-attack rate as low as their fellow Japanese back home. But those who had adopted the more isolated Western lifestyle increased their heart-attack incidence by three to five times. (B) The Power of Social Connection (D) The Sense of Belonging vs. Isolation The digital world.

已解決 回答數: 1