_is the first nation to manufacture true porcelain in the world and has been recognized as “the home of porcelain”()
A. Japan
B. France
China
D. Greece
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Since the founding of the People’s Republic of China, the country has conducted ____ population censuses()
A. 4
B. 5
C. 6
D. 7
理想气体组成的封闭系统吸热后其温度必定增加,其比熵也必定增加()
The PRC has a land area of about_____ million sq km()
A. 9.5
B. 9.6
C. 10.6
D. 10
下列哪种过程不属于自发过程?[ ]()
A. 热量由高温物体传向低温物体
B. 汽车刹车时,汽车的动能通过摩擦转变为热能
C. 水自动地由高处流向低处
D. 热量由低温物体传向高温物体