ভূমিকা : বাবসা-বাণিজ্য এক ধরনের অর্থনৈতিক ও সামাজিক গুরুত্বপূর্ণ কাজ। দেশের আর্থ-সামাজিক উন্নয়নে ও অগ্রগতিতে ব্যবসা-বাণিজ্যের ভূমিকা অত্যন্ত গুরুত্বপূর্ণ। বর্তমান যুগে ব্যবসা-বাণিজ্য ছাড়া কোনো দেশ চলতে পারে না। ব্যবসা-বাণিজ্যে গতিশীলতা না থাকলে জাতীয় জীবনও হয়ে পড়ে স্থবির ও মন্থর। একসময় বিজ্ঞানের হাত ধরে ইউরোপে যে শিল্পবিপ্লব ঘটে গিয়েছিল তখন স্বল্প খরচে পণ্য উৎপাদন ও দেশে দেশে বাজার...

what is rhodium? The 45th element in the periodic table is rhodium.Rhodium's molecular symbol is Rh. It is a rare metal. It is a silvery white, hard and chemically inert transition metal. What is the function of rhodium? It is used to coat optic fibers and optical mirrors and to make crucibles, thermocouple elements and headlight reflectors. It is used as an electrical contact material because...

Heart attacks are the leading cause of death worldwide. Many people die every day from heart problems. Experts say that number increases several times during winter. But the question is why does this happen? According to experts, the risk is higher especially among those who have high blood pressure. In winter, the blood vessels in the body narrow, which is called vasoconstriction. This process...

Whether it is monsoon or summer, insect attacks on trees continue throughout the year. Hobby trees are destroyed by eating the leaves of the tree, destroying the roots, or due to insects or fungi attacking the young leaves. Insects can also be seen on buds and flowers. If you have children or pets at home, it is better not to use chemical pesticides. It also poses a health risk to the user....

Currently, the word pornography is well known among boys and girls of all ages. This pornography is one of the causes of social degradation. Especially, the young society is suffering from this disease called pornography and their addiction to watching porn is causing them to suffer from various physical and mental diseases. As a result, the young society is moving towards destruction. Also,...