记账式债券
参考答案：
记账式债券是一种只在电脑账户中作记录，而没有实物形态的债券。
_________ ,she is still as strong as you. [ ]
A. As old she is
B. Old as she is
C. As she is old
D. As old is she
请说明理想的催化剂载体应具备的条件。
