在自然条件下，对有机质成烃催化活力最强的粘土是（）
A.伊利石型
B.高岭石型
C.蒙-伊混成石型
D.蒙脱石型
参考答案：D
At the age when many people ______ their first job, the youngsters of The Sunday Times Rich List are buying country estates or jetting off to their homes overseas.
A．were looking for
B．have looked for
C．are looking for
D．looked for
( )是保险成立的法律保证。
A．费率的合理厘定 B．可保风险C．保险基金的建立 D．订立保险合同
