解释下列加粗的字。
冻风时作:__________
波色乍明:__________
柔梢披风:__________
汗出浃背:__________
时常;初、始;柳梢;湿透
I was out of town at the time, so I don't know exactly how it ____.[ ]
A. was happening
B. happened
C. happens
D. has happened
人体内最大的内分泌腺是()
A.肾上腺
B.甲状腺
C.唾液腺
D.垂体
E.胸腺