下列地区中,地壳厚度最小的是
A.喜马拉雅山
B.黄土高原
C.大西洋
D.刚果盆
答案:C
本题考查地球的内部结构。地壳厚度的基本规律:大陆地壳有双层较厚,大洋地壳只有单层,较薄。
A project life cycle is a collection of generally sequential project (73) whose name and number are determined by the control needs of the organization or organizations involved in the project. The life cycle provides the basic (74) for managing the project, regardless of the specific work involved.
(73)处填()。
A.phases
B.processes
C.segments
D.pieces
关于克林霉素的抗菌特点,不正确的是()
A.对大多数厌氧菌有效
B.对溶血性链球菌、草绿色链球菌有效
C.对多数革兰阴性菌有效
D.对耐青霉素的金黄色葡萄球菌有效
E.对肺炎球菌有效