狭义的刺法量学要素主要包括手法操作的____和____两大要素。
参考答案：强度；时间
Nothing is so easy as _____ parents to raise their expectations of their children too high. [ ]
A. of
B. to
C. by
D. for
不属于内分泌腺的是
A．胸腺B．腮腺C．甲状腺D．肾上腺E．松果体
