37 如圖所示之滑車系統，欲吊起 4000 N 之重物時，則應施加最少外力 F 為若干 N？ F W
(A)300 N
(B)350 N
(C)500 N
(D)600 N

38 如圖為一行星齒輪系之示意圖，其中齒輪 1 固定不動，齒輪 3 與搖臂 4（arm）之轉速比為 ω3/ω4=1.5，若齒 輪 3 之齒數為 120，試求齒輪 1 與 2 之齒數 N1及 N2各為多少？ (A)N1=40 齒，N2=50 齒 (B)N1=60 齒，N2=30 齒 (C)N1=70 齒，N2=25 齒 (D)N1=80 齒，N2=20 齒

39 如圖所示為一平行於光滑斜面之推力 F，將 W 重之物體推至此光滑斜面最高處，下列有關斜面的機械利益 之敘述，何者正確？ (A)W 愈大，機械利益愈大 (B)F 愈大，機械利益愈大 (C)時間愈短，機械利益愈大 (D)θ愈小，機械利益愈大

40 如圖所示為一摩擦損耗為 20%之起重機系統，捲筒直徑為 D=15 cm，曲柄長度 R=30 cm，若要吊起 W 重量 之物體，則須於曲柄上施力 F，下列何者為此起重機系統之機械利益？ (A)8 (B)32 (C)40 (D)60

36 (A)That is why a few pioneering companies are creating places or times for uninterrupted, focused creative thought. (B)What we urgently need is a revaluing and cultivating of the art of attention. (C)Beeped and pinged, interrupted and inundated, overloaded and hurried—that is how we live today. (D)However, in meetings where everyone is checking e-mail, opportunities for collective creative energy and critical thinking are lost.

37 (A)Such distraction is fragmenting and diffusing our powers of attention. (B)The first step is to learn to speak a language of attention. (C)Beeped and pinged, interrupted and inundated, overloaded and hurried—that is how we live today. (D)That is why a few pioneering companies are creating places or times for uninterrupted, focused creative thought.

38 (A)Such distraction is fragmenting and diffusing our powers of attention. (B)And, once distracted, a worker takes nearly a half-hour to resume the original task. (C)That is why a few pioneering companies are creating places or times for uninterrupted, focused creative thought. (D)The first step is to learn to speak a language of attention

39 (A)According to psychologists and neuroscientists, we cannot divide our attention like that. (B)But the researchers say that many of us do not like, or even hate, to do many things in a short period of time at work. (C)Virtually all of us spend part or most of our day either rapidly switching from one task to another or juggling two or more things at the same time. (D)Although doing many things at the same time can be a way of making tasks more fun and energizing, we have to keep in mind that we sacrifice focus when we do this.

40 (A)According to psychologists and neuroscientists, we cannot divide our attention like that. (B)We may think that it would be nice to focus on just one thing at a time, but the real would does not seem to work that way. (C)Virtually all of us spend part or most of our day either rapidly switching from one task to another or juggling two or more things at the same time. (D)Although doing many things at the same time can be a way of making tasks more fun and energizing, we have to keep in mind that we sacrifice focus when we do this.

41 (A) According to psychologists and neuroscientists, we cannot divide our attention like that. (B)But despite what many of us think, people cannot simultaneously e-mail and talk on the phone. (C)But the researchers say that many of us do not like, or even hate, to do many things in a short period of time at work. (D)Although doing many things at the same time can be a way of making tasks more fun and energizing, we have to keep in mind that we sacrifice focus when we do this.

42 (A)According to psychologists and neuroscientists, we cannot divide our attention like that. (B)But despite what many of us think, people cannot simultaneously e-mail and talk on the phone. (C)But the researchers say that many of us do not like, or even hate, to do many things in a short period of time at work. (D)Virtually all of us spend part or most of our day either rapidly switching from one task to another or juggling two or more things at the same time.

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