Why dont you try asking google or a teacher to help you out?! :D
Answer:
Both are correct
Explanation:
Not all are flowers in the path of engine progress and development. There is a phenomenon that haunts technicians since the beginning of engine development and, it seems, will always be present in the lives of those who work with the engines, this phenomenon is called abnormal combustion, also known as spark knock, ping, and detonation.
During abnormal combustion the increase in temperature and pressure within the combustion chamber which can cause serious engine damage.
Answer:
about succession? it's c.
The right answer is a.anatomy involves symmetry.
In the anatomy of multicellular animals with bilateral symmetry (which form the subregion of bilateria), there are many even organs, that is to say composed of two symmetrical halves, generally positioned on both sides of the median plane. This is the case, for example the human brain that includes two hemispheres, two amygdalas and two hyppocampus, a left and a right.