独山玉产于蚀变辉长岩体内，其（）以上为次闪石化辉长岩。
A.80％
B.85％
C.90％
D.95％
参考答案：C
“十月怀胎”时，胎儿是在母体的（ ）内孕育的．
A．输卵管
B．卵巢
C．子宫
D． * *
We tried to find a table for seven, but they were all _________.
A．given away
B．used up
C．taken up
D．kept away
