Have you ever been startled by a loud
noise or by someone appearing suddenly behind you on dark night or by a snake in
the grass Do you remember the sudden, tight feeling in your chest, the way your
heart started go pound, the way you seemed to breathe more rapidly Such
reactions occurred because you were frightened. Your brain sent a signal to the
special gland (腺) in your body caned the adrenal (肾上的) gland. Other parts of
your body were involved, too, but the adrenal gland has a very special
function. The adrenal gland is located on top of your kidney. Since you have two kidneys. You also have two adrenal glands. Each adrenal gland is divided into two parts: a cortex (外皮) and a medulla (髓质). The cortex forms the outer shell; the medulla forms the central core. Both the cortex and the medulla secrete (分泌) hormones, but they hav A. The adrenal gland is located on top of the kidney. B. Each kidney is composed of two adrenal glands. C. The medulla is inside the cortex. D. The cortex and the medulla have different functions. [单选题]使用绝缘电阻表测量绝缘电阻前后,应将被测设备()
A.对地放电 B.充电 C.充、放电 D.短接 [单项选择]声调应该标在()
A. 韵腹上 B. 韵头上 C. 韵尾上 D. 介音上 [判断题]钢梁现场涂装应采用无机水性富锌防锈底漆。
A.正确 B.错误 [单选题]无人机在姿态模式下
A.飞控参与外回路 B.飞控参与内回路 C.内外均参与 [填空题]管件:通常包括弯头、()、法兰、()、()、翻边短节、活接头等。
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