由上颌尖牙根尖病变引起的间隙感染是
A．咬肌间隙感染B．下颌下间隙感染C．颞下间隙感染D．翼下颌间隙感染E．眶下间隙感染
参考答案：E
We'll go to visit Tian' an men Square _____ it doesn't rain tomorrow. [ ]
A. if
B. as soon as
C. when
D. since
卡氏碟式液限仪测定的液限含水量和按()试验测定的含水量等效。
