下列叙述正确的是:①游艇不得超过安全适航抗风等级开航;②避免在恶劣天气及危及航行安全的情况下航行;③不得超过核定乘员航行;④只要驾驶认为安全可行,可以在任何天气下开航
废物箱应美观适用,与周围环境协调,完好率应不低于%
已知向量a={-1,3,2),b={-3,0,1),则a×b=
电话呼叫人员在口语表达中,要极力避免使用那些易造成表意错乱的( )
人工清扫三级道路时定额为()/工日
_______ is known to all,China will be an _______ powerful country in 20 or 30 years’ time.
吸扫车吸扫时吸不掉脏物或留下脏迹,则应()。
我国和平外交政策的基本立足点是()。
四级道路保洁质量要求
With the publication of( ),Theodore Dreiser was launching himself upon a long career that would ultimately make him one of the most significant American writers of the school later known as literary naturalism.
某项目建设期内第一年贷款2000万元,第二年贷款920万元,贷款在每年内均衡发放,年利率4%,则第二年应计利息为()万元。