Answer:
<h3>The invention of gunpowder.</h3>
Explanation:
- The post classical era often called as post ancient period is the period between 6th century AD to 15th century AD. This period is also known as the medieval period and is known for the various discoveries and inventions made during this age.
- It was during the post classical era China invented the four greatest inventions of all time. They were the gunpowder, printing press, paper and compass.
- The invention of gunpowder changed the whole scenario of warfare. It had a very powerful impact on the ways of battles and warfare all over the world.
This is a personal question. Therefore, only you would be able to accurately analyze how it is that you evaluate options when making a decision. However, there are some common strategies that people follow when such a problem arises.
One example of such a strategy would be making a pros and cons list. This allows the person to better understand the problems and benefits of each approach. Another strategy would be working your way backwards. This involves thinking of the desired outcome first, and then retracing the steps that might lead you in that direction. A third example involves talking to people who have faced similar challenges and asking them for advice.
Is this a true or false question? If so it is True.
<span>Because they already became a tributary state to China, they were invaded by Japan and eventually were conquered by the Manchus. They felt like "a shrimp among two whales", or in other words, inferior to the Japanese and Chinese, so they started their own country and excluded all foreigners except very few selected Japanese and Chinese.</span>
Sinoatrial node part of the autonomic nervous system adjusts the heart rate and the arteriole diameter to regulate blood pressure through negative feedback
The SA (sinoatrial) node is generates an electrical signal that can causes the upper heart of the chambers (atria) to contract. The signal and then passes through the AV (atrioventricular) node to the lower of the heart chambers (ventricles), causing them to contract, or to pump. The SA node is considered the pacemaker of heart.
The sinus node continuously generates electrical impulses, thereby setting the normal rhythm and also rate in a healthy heart. Hence, the SA node is also referred to as the natural pacemaker of the heart
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