题目内容
资料题：What is true about the downloadable application?
2021-12-13
A.It is not essential to operate the air purifier.
B.It can be obtained online for a small charge.
C.It detects the purifier and installs itself automatically.
D.It identifies problems with the machin
参考资料
Pure-Air Quite simply, we have the best air purifiers on the market. Green Air is Pure-Air's newest air purifier. This model is ideal for those who have allergies or who suffer from asthma and other breathing problems. Allergy-inducing pollutants can enter your home easily. In fact, every few hours, the air inside is replaced by outside air. Those prone to allergies need a system for filtering the air that comes in. Here's what Green Air offers you: •High-capacity filter lasts two months•Won’t disturb your sleep or add to background noise•Guaranteed to kill airborne germs and chemicals•Stylish and comes in a variety of colors•Has built-in Wi-Fi so you can control it remotelyPure-Air products are sold at all retail appliance stores. Offerings vary, so contact the retailer first. Thank you for purchasing Green Air purifier. Here are quick instructions for using yourappliance:-Place your machine on a flat surface with open air around it. Avoid putting it in a place where it can be disturbed or knocked down.-Plug in the purifier. The LED display should switch on immediately. Your appliance is now ready to use.-You may also download and install the Green Air application to control your device from your mobile phone. Visit our Web site on your Internet-powered phone and click on the “Downloads” link. Download and install the Green Air app on your phone. It takes less than a minute to install.- Open the Settings menu either on your appliance or on the application to select your preferred options.-Replace the filter when the red light goes on.It’s that easy! Your appliance is now cleaning the air in your room! 
In conclusion, Green Air largely works as advertised, at least insofar as its primary function is concerned—cleaning the air of harmful germs and chemicals. And while other products are more aesthetically pleasing, none can match the practical aspects of Pure-Air.Below are some of our users' comments on the product:•”I spent $350 for my Green Air, but the air quality in my home is so much better."— Alice Waters•”I chose this model because I thought it would be quiet, but an audible hum developed after a few months of use."— Steve Turnbull•"Is the air in my home that dirty? I had to change the filter after just four weeks. Hope the next filter lasts longer!"— Katie Reed•"After one week, there’s a bad smell coming from the filter. Very disappointed.” — Sally Chase.Load more comments ▼
In conclusion, Green Air largely works as advertised, at least insofar as its primary function is concerned—cleaning the air of harmful germs and chemicals. And while other products are more aesthetically pleasing, none can match the practical aspects of Pure-Air.Below are some of our users' comments on the product:•”I spent $350 for my Green Air, but the air quality in my home is so much better."— Alice Waters•”I chose this model because I thought it would be quiet, but an audible hum developed after a few months of use."— Steve Turnbull•"Is the air in my home that dirty? I had to change the filter after just four weeks. Hope the next filter lasts longer!"— Katie Reed•"After one week, there’s a bad smell coming from the filter. Very disappointed.” — Sally Chase.Load more comments ▼