半解剖式牙牙尖斜度为( )
A.20°
B.30°
C.33°
D.无牙尖
E.10°
参考答案:A
解析: 解剖式牙牙尖斜度为30°或33°,半解剖式牙尖斜度为20°,非解剖式无牙尖。
The Great Wall was made not only by _____, but also the flesh and blood of _____ men. [ ]
A. earth and stone, millions of
B. earths and stones, millions
C. the earth and stone, million of
D. the earths and stones, millions
论述原料乳在运输过程中要注意那些事项