金瓷修复体中，如金瓷热膨胀系数不匹配，出现后果是
A．颜色发生改变
B．金瓷结合强度减弱
C．金属基底冠增厚
D．瓷裂和瓷崩
E．瓷层不够
参考答案：D
（12分）高空遥感探测卫星在距地球表面高为2R处绕地球转动。人造卫星质量为m，地球半径为R，地球表面重力加速度为g，
试求：（1）人造卫星的运行速度大小v；
（2）人造卫星绕地球转动的周期T；
（3）人造卫星的向心加速度an。
The number of those missing in the New Zealand's earthquake was reported more than 200, including those discovered bodies that have yet to be ________.[ ]
A. judged
B. recognized
C. identified
D. confirmed
