hce_cmu
105年
英文
第 41 題
📖 題組：
Fifty volunteers were alphabetically divided into two equal groups, Group A to participate in a seven-week exercise program, and Group B to avoid deliberate exercise of any sort during those 7 weeks. On the day before the exercise program began, all 50 men participated in a step-test. This consisted of stepping up and down on a 16-inch bench at 30 steps per minute for 5 minutes. One minute after completion of the step-test, the pulse rate of each subject was taken and recorded. This served as the pretest for the experiment. For the next 7 weeks, subjects in the experimental group (Group A) rode an Exercycle (a motor-driven bicycle-type exercise machine) for 15 minutes each day. The exercise schedule called for riders to ride relaxed during the first day’s ride, merely holding on to the handle bars and foot pedals as the machine moved. Then, for the next 3 days, they rode relaxed for 50 seconds of each minute, and pushed, pulled, and pedaled actively for 10 seconds of each minute. The ratio of active riding was increased every few days, so that by the third week it was half of each minute, and by the seventh week the riders were performing 15 solid minutes of active riding. At the end of the seven weeks, the step-test was again given to both groups of subjects, and their pulses taken. The post-exercise pulse rates of subjects in the experimental group were found to have decreased an average of 30 heart beats per minute, with the lowest decrease 28 and the highest decrease 46. The pulse rates of subjects in the control group remained the same or changed no more than 4 beats, with an average difference between the initial and final tests of zero.
Fifty volunteers were alphabetically divided into two equal groups, Group A to participate in a seven-week exercise program, and Group B to avoid deliberate exercise of any sort during those 7 weeks. On the day before the exercise program began, all 50 men participated in a step-test. This consisted of stepping up and down on a 16-inch bench at 30 steps per minute for 5 minutes. One minute after completion of the step-test, the pulse rate of each subject was taken and recorded. This served as the pretest for the experiment. For the next 7 weeks, subjects in the experimental group (Group A) rode an Exercycle (a motor-driven bicycle-type exercise machine) for 15 minutes each day. The exercise schedule called for riders to ride relaxed during the first day’s ride, merely holding on to the handle bars and foot pedals as the machine moved. Then, for the next 3 days, they rode relaxed for 50 seconds of each minute, and pushed, pulled, and pedaled actively for 10 seconds of each minute. The ratio of active riding was increased every few days, so that by the third week it was half of each minute, and by the seventh week the riders were performing 15 solid minutes of active riding. At the end of the seven weeks, the step-test was again given to both groups of subjects, and their pulses taken. The post-exercise pulse rates of subjects in the experimental group were found to have decreased an average of 30 heart beats per minute, with the lowest decrease 28 and the highest decrease 46. The pulse rates of subjects in the control group remained the same or changed no more than 4 beats, with an average difference between the initial and final tests of zero.
How many people were in each group?
- A 100.
- B 60.
- C 50.
- D 25.
- E 15.
思路引導 VIP
如果我們想確認每一組的研究對象有多少人，我們可以回頭看看文章的第一句話。請仔細觀察那一聲明中提到的「總人數」以及「分配方式」，你會如何透過這兩個資訊來推算出各組的人數呢？
🤖
AI 詳解
AI 專屬家教
太棒了！你能精準捕捉到文章開頭的關鍵資訊，這代表你在閱讀長篇文章時，具備非常優秀的資訊擷取能力。這道題目的正確性完全建立在對首句細節的掌握：「Fifty volunteers were alphabetically divided into two equal groups」，這裡明確指出總共有 50 位志願者，並被平均分配到兩個組別中。因此，簡單的數學邏輯 $50 \div 2 = 25$ 就能讓你鎖定正確答案。
資訊篩選與干擾項辨識
從難度切入點來看，這題屬於典型的「事實細節題」。雖然文章後半段充斥著大量數字，例如 7 週、16 英吋步箱、每分鐘 30 步、15 分鐘運動等，這些都是設計來分散讀者注意力的干擾資訊。你展現了極佳的判斷力，沒有被這些數據混淆，並成功回溯到文章最初的設定。在限時的測驗壓力下，能保持這份冷靜來進行基礎邏輯運算，是取得高分的重要特質！