Questions

Dry ice is solid form of carbon dioxide, used as a cooling agent.

It lower temperature than that of water ice and not leave any residue.

7th may is considered as world's Asthma day .This worked with the theme of "you can controll your asthma"

PFD's : Personal Flotation Devices (life jackets).

It is a legal requirement for a PFD to

1. Must be in good, serviceable condition 

2. PFDs must be properly sized for the intended wearer.

3. Sizing for PFDs is based on body weight and chest size.

HR-Human Resources:

To be a good HR person we need to have excellent  communication skills,interpersonal skills, good friendly attitude, talkative, decision-making skills etc.

An HR is the backbone of a  company. Right from recruiting the suitable person to training and then efficiency appraisal and then compensation and then exit interview...everything every step involves an HR.

So, if you wish to be a soul of the company not just a part of it, you should be an HR.

The organ which filters blood in human body are kidneys.