Administrations should bear in mind the significance of （） in maintaining safety of life and property at sea and in preventing marine pollution.
A. advanced nautical equipment
B. advanced performance main engines
C. emergency equipment
D. communication and language skill
查看答案
园林绿地规划是在国家政策与法规的指导下，根据以（）效益为首，综合园林任务的要求，以植物素材为主，结合其它园林要素，进行科学的艺术布局，形成各类园林，并将其有机地组成城市园林绿地系统。
Adjust （） by means of lead wire.
A. the clearance of the main bearing
B. the diameter of main bearing
C. the gap of main beating
D. the tolerance of main bearing
微信支付 
支付宝支付