小儿腕骨骨化中心出全的数目是（）
A.4
B.6
C.8
D.10
E.12
参考答案：D
— _____ weather! Shall we go to the park?
— _____. Let's go. [ ]
A. What a fine, Sounds great
B. What fine, Sounds great
C. What a fine, You're right
D. What fine, You're right
WK-20型挖掘机进行斜坡作业时，对停机面有什么要求？
