A
(2020·山东潍坊高二期中考试)
Study lamps are vital to learning. Finding the best lighting for study is important for everyone. For the sake of maximizing the use of time and energy, and for the very important goal of preserving eyesight, anyone reading for understanding needs not only adequate light, but light that ensures reading with ease. Only when eye strain(疲劳) is not interfering does the learning process move forward.
Desk lamps
You can purchase a large number of stylish desk lamps from lamp stores and online. The products range from precious ones to casual ones, from traditional ones to ultra－modern(超现代的)ones. They feature such desirable additions as dimmer switches and night lights. Some have battery backup in case of power failure and a choice of OttLite bulbs that duplicate natural sunlight.
LED desk lamps
MetaEfficient reviews the most recommended LED desk lamps. These lamps come in many different styles and brand names and are valued for their directed beam of light, lack of heat and exceptional energy efficiency and brilliance. LED study lamps are made in goose neck and swivel(转圈)styles, as well as the more modern Z－bar and the human－like－ figure of the Moppel light.
Safest desk lamps
According to Knol, StudyLite is the safest of all desk lamp designs. Not only does it provide LED light, freeing people from UV and IR radiation, but it has been tested to be eye－friendly. It has all the advantages—low cost and long life—of any LED lamps, but it is also equipped with rechargeable battery. Its design and choice of colors make it desirable for more than its efficiency.
文章大意：这是一篇应用文。学习灯至关重要。找到最佳的学习照明对每个人都很重要。本文主要给读者介绍了3种最佳照明灯的信息。
21．What is the feature of Desk lamps？__D__
A．They are bought easily online.
B．Their prices vary.
C．Their styles are various.
D．They have satisfactory additions.
解析：细节理解题。根据第二部分的They feature such desirable additions as dimmer switches and night lights. Some have battery backup in case of power failure (它们的特点是理想的附加功能，如调光开关和夜间照明。一些有电池备份，以防停电。)可知，Desk lamps的特点是它们有理想的附加功能。D. They have satisfactory additions.(它们有令人满意的附加功能。)符合以上说法。故选D项。
22．What do LED lamps and StudyLite lamps have in common？__A__
A．Low cost and long life.
B．Excellent energy efficiency and brightness.
C．Rechargeable batteries.
D．Their design and color choice
解析：细节理解题。根据Safest desk lamps部分的“It has all the advantages—low cost and long life—of any LED lamps”可知，StudyLite具有所有LED灯的优点——低成本和寿命长。A. Low cost and long life.(低成本和寿命长。)符合以上说法。故选A项。
23．What is the main purpose of the text？__B__
A．To give us some tips on how to protect our eyes.
B．To give us some information on the best study lamps.
C．To introduce the method of choosing a proper lamp.
D．To present the finding that light affects study.
解析：推理判断题。根据文章的主要内容，尤其是第一段的“Study lamps are vital to learning. Finding the best lighting for study is important for everyone.(学习灯至关重要。找到最佳的学习照明对每个人都很重要)”可推测，本文的主要目的是给读者提供一些最佳照明灯的信息。B. To give us some information on the best study lamps.(为了给我们一些关于最佳学习灯的信息。)符合以上说法。故选B项。
