干旱是指由于雨水不足以致破坏了气候平衡和协调的现象。
参考答案:错
电力电缆按结构分,由()、内、外护层组成。
Effective stakeholder management includes all of the following project elements EXCEPT ______ .
A.clear requirements definition
B.scope change control
C.timely status information
D.frequent cost reports