如一图为科学家为研究脑的功能用三只狗所做的实验．图二为神经调节模式图，请据图回答下列问题：

    Many people today like reading stories about UFO.Many people in different countries are studying the UFO.

    There are some different saying for UFO.Among those sayings,the most popular one for UFO is that UFOs are strange creatures(生物) to the earth from other stars.We can call them aliens.

    UFO scientists and many people believed this saying.Some people said that they saw a few UFOs landing on the earth.They seemed to be objects rather like big plates.Some people said that they saw some strange visitors coming out of the UFOs.

    Some people make mistakes when they say they have seen UFOs high in the sky.Perhaps they see a weather balloon or an uncommon plane or the light they see in the sky comes from the ground.Sometimes they see the light from the moon.

    But these are a lot of others we can't understand.It may take many years to find a clear answer and then people will give UFO another name.

如图是煤气灶灶头的示意图，基本操作是：打开煤气阀，拧动点火装置，煤气和空气在进口处混合流向燃烧头被点燃。有同学担心燃烧时煤气在进口处是否会向空气中泄漏？你的观点：我认为煤气在进口处____（选“会”或“不会”）向空气中泄漏，理由是____。