A
We found and researched top - rated alarm clocks. Over the duration of one month, here are all the tests we ran：
■ Performance
Readability： We took note of how visible the numbers or analog （长短针的）hands on the clock were, both in the day and night.
Ease of setting： We noted how difficult it was to set the alarm on each clock, and the time it took.
Wake —up experience： We tested the alarm and noted the volume （音量）.tone, harshness （剌耳）and general experience of waking up to the alarm.
Dimmability ： We tested how dimmable （可调光的）each clock was in the light and the dark.
Snooze （打盹）： We tested how easy it was to snooze the alarm, and took note if it was customizable and easy to set.
Power： We noted if the clock needed batteries, a power cord or both. If it needed a power cord, we measured the cord.
• Build
Materials： We felt each alarm clock and judged how nice or cheap it felt, including buttons and dials.
Durability： We knocked each alarm clock off the same bedside table five times, noting any damage after each drop.
Appearance： We noted its size and color options, and rated its beauty.
■ X factors
Extra features： We noted and tested any and all extra features and how useful they were.
• How we rated
Based on the criteria above, we gave each alarm clock a score for each test, totaling into a score for each category, which we then added up for a final overall score. Here's a full breakdown：
Performance had a total of 70 points： readability （15 points） , ease of setting （15 points), wake-up experience (15 points), dimmability (10 points), snooze (10 points) and power (5 points).
Build had a total of 30 points： materials (10 points)« durability (10 points) and appearance (10 points).
X factors had a total of 5 points： extra features (5 points).
21. What can you do when testing the clock's dimmability?
A. Note its colour. B. Change its brightness.
C. Check its battery. D. Estimate it's value. 、
22. Which of the following belongs to the clock's build?
A. Readability. B. Snooze. C. Durability. D. Power.
23. Which of the items is given the lowest score?
A. Appearance. B. Wake—up experience.
C. Ease of setting. D. Extra features.
