对磷酸锌粘固剂的描述，不恰当的为（）。
A．.牙髓刺激较大
B．温度高时凝固快
C．粉剂中主要是氧化锌
D．可溶于唾液
E．凝固后体积膨胀
参考答案：E
电力变压器的瓦斯保护有哪些优缺点？
Before the operation, the doctor had to talk to the patient in order to move her fear ________ she might die during the operation.
A．when
B．that
C．which
D．so that
