2平方千米=______公顷
2000平方分米=______平方米．
2平方千米=200公顷；
2000平方分米=20平方米．
故答案为：200；20．
为什么苯塔要采用温差控制？
Including a contingency reserve in the project budget is intended to （）.
A．reduce the probability of scope changes
B．increase the probability of scope changes
C．reduce the probability of a cost overrun
D．increase the probability of a cost overrun
