用所给单词的适当形式填空

1. We all know that more than half of our ideas or feelings__________(express) by our tone of voice.

2. We can read the mind by_________(understand) these non-verbal messages.

3. ________ ( cross) one's legs in the United States is a sign of____________ (be) relaxed.

4. Remember____________  (not pretend), because your body  speaks all the time.

5. He asked someone____________(come) near by putting up his hands.

关于肾上腺髓质的叙述，下列哪项是错误的（）

A.受交感神经节前纤维支配

B.节前神经末梢释放乙酰胆碱

C.神经递质作用于嗜铬细胞上的N型受体

D.释放去甲肾上腺素为主

E.在应急反应时激素释放增加