结构设计的目的不仅要保证结构的可靠性,也要保证结构的经济性。
A. 对
B. 错
承载能力极限状态和正常使用极限状态,都应采用荷载设计值进行计算,因为这样偏安全。
A. 对
B. 错
The International SafetyNet Service is able to address the call to __________
A. all vessels
B. selected groups of ships
C. a particular ship
D. a,b,c are all
The COSPAS-SARSAT system can provide distress alerts to the appropriate rescue authorities
A. at sea
B. on land
C. in the air
D. Throughout the world