Question

【題目】 Altitude training is a way of encouraging the body to produce more red blood cells, which can improve endurance (耐力 )when performing activities at lower altitudes. This kind of training normally involves living at a high altitude and training at a lower one, because the body needs oxygen to train. 【1】 Athletes from endurance sports typically benefit from this kind of training, but its effects will be felt by anyone who has a long stay at a high altitude.

For the purposes of altitude training, an altitude of about 2, 500 meters is desirable but any relatively high altitude will work. 【2】 So it is common to use a lower altitude.

【3】 this is accomplished by using the body’s natural response to needing more oxygen over a long period of time. There are people who question whether altitude training actually works by increasing the number of red blood cells. In theory, if one is competing at sea level, the increase in red blood cells will last for several days, after leaving the high altitude, giving one a competitive edge. 【4】

While altitude training is primarily used by athletes who need increased endurance, the desired effects of high altitudes will be experienced by anyone who travels to a high altitude for a long period of time.【5】 Children who normally live at high altitudes can become very active when brought to low altitudes due to similar effects.

A. Less oxygen makes them hard to breathe.

B. Red cells have been proved to be effective

C. It’s difficult to find altitudes this high that are still fit for training

D. It can be argued that any positive effects disappear too quickly to be useful

E. However, it is more common to actually travel to high altitudes in order to train

F. The purpose of altitude training is to increase the number of red blood cells in the body

G. Many people experience a great increase in energy when returning from high altitudes

Answer 1

【答案】

【1】E

【2】C

【3】F

【4】D

【5】G

【解析】

本文是說明文。高原訓(xùn)練不僅能夠改善運(yùn)動(dòng)員的耐力，同時(shí)在運(yùn)動(dòng)員離開高原后其影響也能夠持續(xù)一段時(shí)間。

【1】根據(jù)空格前面內(nèi)容“This kind of training normally involves living at a high altitude and training at a lower one”可知，這里說的是高原訓(xùn)練的場所。故選項(xiàng)E符合語境。

【2】根據(jù)空格后面內(nèi)容“So it is common to use a lower altitude.”可知，上下文為因果關(guān)系。故選項(xiàng)C符合語境。

【3】根據(jù)空格后面內(nèi)容可知，高原訓(xùn)練的目的是增加人體紅細(xì)胞的數(shù)量。故選項(xiàng)F符合語境。

【4】根據(jù)空格前面內(nèi)容可知，可以這樣說，任何積極的影響消失得太快，以致于無法發(fā)揮作用。故選項(xiàng)D符合語境。

【5】根據(jù)空格前后內(nèi)容可知，許多人從高海拔地區(qū)返回時(shí)會(huì)經(jīng)歷能量的大幅增加。故選項(xiàng)G符合語境。