金绿宝石的结晶多呈双晶生长，金绿宝石的常呈的双晶形态为（）
A.巨片双晶
B.接触双晶
C.轮式双晶
参考答案：C
Things, ______is often the case, will turn out to be against one's wishes.[ ]
A. what
B. as
C. it
D. that
四逆散证的四肢厥冷是由肾阳虚衰所致的。（ ）
