（35÷3）：（1÷4），
=0.2：0.25，
=4：5；
故选：D．
We Chinese ____ our soldiers who did so much for the suffering people there during the Wenchuan earthquake. [ ]
A. proud of
B. are pride of
C. take pride in
D. take pride of
患者夏某，缺失，余留牙及牙周组织健康，要求做整铸支架活动义齿修复。
钴铬合金支架铸圈的铸造温度是（）
A．700℃维持30min
B．750℃维持30min
C．800℃维持30min
D．850℃维持30min
E．900℃维持30min
F．1000℃维持30min
缺失，余留牙及牙周组织健康，要求做整铸支架活动义齿修复。