基托表面有不规则的大气泡的原因是（）
A.填胶过早
B.单体挥发
C.热处理时升温过快
D.填胶不足
E.热处理时间过长
参考答案：D
易致心律失常
A．乙醚 B．氟烷 C．硫喷妥钠 D．氯胺酮 E．东莨菪碱
In spite of the wide range of reading material specially written or ______ for language learning purposes, there is yet no comprehensive systematic program for the reading skills.
A. adapted B. acknowledged C. assembled D. appointed
