白云石的分解温度高于石灰石的分解温度。
参考答案：错
After two months’ training，the astronauts are ________to adapt to the conditions of weightlessness.
A．accustomed
B．coming
C．realized
D．succeeding
磨损大致可分为（）
A.粘着磨损
B.磨粒磨损
C.表面疲劳磨损
D.腐蚀磨损
E.跑合磨损
