领导体制
参考答案：领导体制：一个组织领导机构的设置和权限的划分制度，是领导者职能及其意图借以实现的组织机构形式。
He had no idea of what he should say in answer to the question, ______?
[ ]
A. did he
B. should he
C. didn't he
D. shouldn't he
用碱提取的极生蓝细菌能够从Cd溶液中吸收超过90%的Cd离子，所吸附的金属可占生物体干重的（）。
A.18%
B.30%
C.5%
D.10%
