求25.題答案是B，詳解是「政府已優先進行植樹造林工作，選擇最耐逆境的樹種來鞏固沙洲」文中沒提到這點，單純只能靠對時事的了解作答？還是他問的是從根本解決？

⑤ 生活時事題組 ♡海洋教育議題 七股潟湖是 300 多年前的台江內海遺跡,位於台江國家公園內,當地俗稱「內海仔」,其外圍 有3個不與海岸相連的沙洲,由北往南分別是青山港汕、網仔寮汕與頂頭額沙。沙洲位於潟湖的外 面,可隔擋外海的風浪,讓內海的潟湖成為較平靜安全的水域,可供魚蝦貝類生存,沿海居民在此 捕抓魚類或養蚵,成為在地居民重要的生計來源。在 1904年 1975年 1990年 但是近年來潟湖面積縮小,主要原 因是受到自然環境的影響而導致沙洲不 斷地被侵蝕,沙洲有窄化、高度變矮等 危機,且沙洲的沙不斷地被帶往潟湖, 讓潟湖逐漸陸化,圖因為國內地理學者 對此地區做深入調查,並畫出曾文溪口 海岸的變遷。 251 七股潟湖的變遷 圖太 |網仔寮汕 頂頭額汕 [山港汕 七股潟湖 將軍溪 三股溪 竹筏港 曾文溪 (323 根據圖内沙洲的漂移方向,此地區的沙洲如何變化? (A)往北往內陸飄移 (B)往東往內陸飄移 單元2 臺灣的地形、海岸與島嶼 39. += 青山港汕 網仔寮汕股 頂頭額汕 新浮崙汕 七股潟湖 (A)颱風 (B)海浪 (C)地震 (D)東北季風 (B ☆ 面對文中提及的危機,下列哪個做法可以減緩問題的惡化? (A)啟動填海造陸 (B)在沙洲植樹造林 )河川上游增蓋攔沙壩 海岸覆蓋水泥堤防 將軍溪 +紋 曾文溪 (C)往南往外海飄移 (D)往西往外海飄移 (C)24 根據上文內容判斷,造成潟湖面積縮小的主因與下列何者關係最小? THREE C 青山港汕 網仔寮沙 頂頭額汕 新浮崙汕 七股潟湖 + 將軍溪 曾文溪 720P 百果乾新交

三題不懂

1. The watch cost me three hundred dollars. (用 pay 改寫)(3分) 2. Playing video games is interesting. (It... ) (3) 3. Eric/want/be a cook/the future. (F) (45)

三題不會

1. The watch cost me three hundred dollars. (用 pay 改寫)(3分) 2. Playing video games is interesting. (It... ) (3) 3. Eric/want/be a cook/the future. (F) (45)

三題不會

1. The watch cost me three hundred dollars. (用 pay 改寫)(3分) 2. Playing video games is interesting. (It... ) (3) 3. Eric/want/be a cook/the future. (F) (45)

不會

(play) basketh Ben: What kind of Sam: I 我喜愛衝浪 多麼棒的體驗! ↓ 7 Sam did you do? a worker at a 良和玩帆船。(enjoy) 圖詳答問題 2. (What...!) 3. 我在 ·家工廠當工人。 8 hours. 1. Did Sue work as a waitress in the restaurant? 2. What's there in the Great Barrier Reef? (FS) 3. Did Mr. Lin spend three hours flying to Australia? 4. Is David's father a factory worker? 5. What does Luke enjoy doing?

不會寫

(play) basketh Ben: What kind of Sam: I 我喜愛衝浪 多麼棒的體驗! ↓ 7 Sam did you do? a worker at a 良和玩帆船。(enjoy) 圖詳答問題 2. (What...!) 3. 我在 ·家工廠當工人。 8 hours. 1. Did Sue work as a waitress in the restaurant? 2. What's there in the Great Barrier Reef? (FS) 3. Did Mr. Lin spend three hours flying to Australia? 4. Is David's father a factory worker? 5. What does Luke enjoy doing?

想詢問這個該如何證明？

of duration relat- ing to the maturity, yield, and coupon interest of the security being analyzed. Duration and Maturity A comparison of Tables 9-6, 9-3, and 9-7 indicates that duration increases with the maturity of a fixed-income asset or liability, but at a decreasing rate:4 OD OM > 0 d²D dM² <0 To see this, look at Figure 9-4, where we plot duration against maturity for a three-year, a two-year, and a one-year U.S. Treasury bond using the same yield of 4 This is the case for the vast majority of securities. It needs to be noted, however, that for bonds selling below par, duration increases at a decreasing rate up to a point. At long maturities (e.g., 50 years) dura- tion starts to decline. Few bonds in the market have a maturity long enough to see this decline.

想請問這四題

98. A baseball is hit straight up and is caught by the catcher 2.0 s later. The maximum height of the ball during this interval is: 4.9 m 2÷2=1 XA) B) C) D) E) 7.4 m 19.4 m 38.8 m 19.6 m 122. DA If the x component of a vector A, in the xy plane, is half as large as the magnitude of the vector, the tangent of the angle between the vector and the x axis is: A) √3 B) 1/2 C) √3/2 3/2 D) E) 3 142. Two vectors lie with their tails at the same point. When the angle between them is increased by 20° the magnitude of their vector product doubles. The original angle between them was about: A - B = |A|| B|cos O 2 L² cose = L² cos (0+20²) 2005 = cos@casso. sing sino A) 0 B) 18° C) 25° D) 45° E) 90° BA 158. Identical guns fire identical bullets horizontally at the same speed from the same height above level planes, one on the Earth and one on the Moon. Which of the following three statements is/are true? A) III only B) I and II only - 0-9 cose-adsint I. The horizontal distance traveled by the bullet is greater for the Moon. II. The flight time is less for the bullet on the Earth. III. The velocities of the bullets at impact are the same. I and III only II and III only 1.1 cos@=-035n9. tant = 1/3 C) D) E) I, II, III h-Vortat² xoxt-txt tu-Jite

我知道第一步要先Fa cross rpa +Fb cross rpb +Fc cross rpc,但下一步就不知道怎麼做了，列出解題過程就好，謝謝

LUST. Replace the three forces acting on the plate by a wrench. Specify the magnitude of the force and couple moment for the wrench and the point P(x, y) where the wrench intersects the plate. X FB = {-300k} N B Fc = {200j} N 5 m 9 FA = {400i} N Z C P A Prob. 4-137 3 m

想問3-9的a跟c

Problems 3-1. Explain the difference between *(a) random and systematic error. (b) constant and proportional error. *(c) absolute and relative error. (d) mean and median. *3-2. Suggest two sources of systematic error and two sources of random error in measuring the length of a 3-m table with a 1-m metal rule. 3-3. Name three types of systematic errors. *3-4. Describe at least three systematic errors that might occur while weighing a solid on an analytical balance. *3-5. Describe at least three ways in which a systematic error might occur while using a pipet to transfer a known volume of liquid. 3-6. Describe how systematic method errors may be detected. *3-7. What kind of systematic errors are detected by varying the sample size? 3-8. A method of analysis yields masses of gold that are low by 0.4 mg. Calculate the percent relative error caused by this result if the mass of gold in the sample is (a) 500 mg. (b) 250 mg. V(c) 125 mg. (d) 60 mg. 3-9. The method described in Problem 3-8 is to be used for the analysis of ores that assay about 1.2% gold. What minimum sample mass should be taken if the relative érror resulting from a 0.4-mg loss is not to exceed *(a) -0.1%? (b) -0.4%? (c) -0.8%? (d) - 1.1%? 3-10. The color change of a chemical indicator requires an overtitration of 0.03 mL. Calculate the error if the total volume of titrant is percent relative (a) 50.00 mL. (c) 25.0 mL. 3-11. A loss of 0.4 mg of Zn occurs in the course of an percent relative analysis for that element. Calculate the error due to this loss if the mass of Zn in the sample is *(b) 10.0 mL. (d) 30.0 mL. 190 (c) 188 (d) 4.52 x 103 4.63 x 103 4.53 x 10 ³ √6 *(a) 30 mg. (b) 100 mg. *(c) 300 mg. (d) 500 mg. 3-12. Find the mean and median of each of the following sets of data. Determine the deviation from the mean for each data point within the sets, and find the mean devi- Vation for each set. Use a spreadsheet if it is convenient. *(a) 0.0110 0.0105 (b) 24.53 0.0104 24.68 24.81 24.77 39.61 862 (f) 850 MA 3-13. Challenge Problem: Richards and W the molar mass of lithium and colle data. 24.73 Experiment 1 2 3 4 5 6 194 447 X 10 7 448 X 107 4.58 X 10 (a) Find the mean molar t workers. (b) Find the median molar ma (c) Assuming that the cam molar mass of lithium is the absolute ertor and of the mean value demi Willard. (d) Find in the chemical ues for the molar mus since 1910, and ag a table or spreadshera 1817 given in the a Richards and Willd. Com mass versus year to la of lithium has chang Suggest possible abruptly about 18 ant de (e) The incredibly deals Richards and W that major changes will occur. Disc calculation in pat (f) What factors ha since 1910? (g) How would you mass? 6See Chapter 2 of Applications of Microsoft Excel in Analytical Chemistry, 4th ed., for information about statistical 7T. W. Richards and H. H. Willard, J. Am. Chem. Soc., 1910, 32, 4, DOI: 10.1021/ja01919a002. built-in statistical functions. "Answers are provided at the end of the book for questions and problems marked with an asterisk The I of ₂ or inc rce of able vas error c often in individu ate resul data in rtainties. dimensio andom e analysts The result