年級

問題的種類

英文 高中

請問第4題應該選什麼?

ne more e conflic 1. Few man-made structures are more famous than the Statue of Liberty. The noble, goddess-like face, the long, flowing Roman robe, the spiky crown, and the large tablet are all features of the ___(1)__ that people around the world can easily identify*. Another part of the statue most people recognize, _(2)____ they might not know the full story behind it, is the giant golden torch Lady Liberty holds in her right hand. When the idea for the statue was initially proposed in France, it was in fact this flame__(3) first arrived in New York City. The project organizer actually displayed it in Madison Square Park as early as 1876 (4) local funding for the project. This would help pay for the massive* base (5) the proposed figure's feet stand on, while France covered the cost of the actual statue. Eventually, efforts to raise money went__(6)__ well that the project could go ahead as planned. The entire statue could thus be completed, shipped, and assembled* within a decade, just in time for the hundredth anniversary* of America's independence (7)__Britain. A century later, Lady Liberty underwent* some renovations*, during which workers____(8)_ the old torch (8) the statue. They then installed a new one _(9)___ gold leaf on its surface. This has lit the way to (10)__ ever since. And long may it burn! identify massive assemble anniversary goddess-like 念日 undergo 經歷 renovation 翻修 (B) (1)(A) celebration (B) statue (C) globe (D) slave C) (2)(A) as soon as (B) as though (C) even though (D) not until (3)(A) when (B) that (C) what (D) who (4)(A) by collecting (B) of collection (C) in collecting (D) to collect (5)(A) that (B) who whom (D) where (C) even (D) so (C) into (D) upon (B) represented; with (C) removed; from (D) attracted; from (6)(A) also (B) such ) (7)(A) with (B) from ( ) (8)(A) celebrated; with () (9)(A) with (B)in (C) like (D) to (13) (10) (A) treatment (B) tourism (C) slavery (D) freedom them is the Statue of Liberty in the United U+C+A²=

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自然科學 大學

求解答案是否正確

Multiple-choice questions: (70 points) write the letter of statement that is not true: 1. A.B.U The Drude Model: (a) It is a classical approach using concepts from the kinetic theory of gases. (b) A relaxation-time approximation is used where the probability of collision is l/t. (c) No forces act on the electrons in between collisions. (d) It predicts accurately the electronic heat capacity of metals. 2. The Sommerfeld Model: (a) The crystal potential is replaced by an average Coulomb potential. (b) The separation of states is so close that a continuum model can be applied. (c) The electrons are highly localized due to a strong crystal potential. (Q) The energy of the highest occupied state at 0 K is the Fermi energy. 3. Density of states in k-space, N(k): (a) N(k) is determined by the boundary value conditions. (b) For lattices in any dimensions, N(k) is constant in k-space. (C) N(k) depends on the direction and magnitude of k. (d) It is directly proportional to the volume of the crystal. E影響, c 4. The Fermi surface of a metal: (a) is responsible for many of the transport properties of the metal, (b) depends on the nature of the chemical bonds, (c) is always a sphere, (d) can involve mixing of electron orbitals. ✓ 5. The conductivity of a material () increases with the mobility of its carriers, (b) increases with the density of carriers, (C) it is inversely proportional to the energy gap. cogu changes with temperature. 6. BID Plasmons: (a) They are an important characteristic of the Sommerfeld electron gas model. (b) Plasmons occur spontaneously in metals. (c) They are related to charge density oscillations. (d) The Plasmon energy is typically of the order of 10 eV. The Fermi energy Ef in intrinsic semiconductors 8) is usually close to y E, at OK (b) it ACiD. can increase or decrease with temperature depending on the ratio of hole and electron effective masses, (c) it represents the point at which the probability of occupation is 12, even though there may not been any states with that energy, (d) its value relative to the electronic bands must remain unaffected in the presence of defects or interfaces.

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