2nd class

Application of Double Basic Stations GPS-RTK to 1st Class or 2nd Class Control Survey

双基站GPS-RTK在一、二级控制测量中的应用

This is a 2nd class tall medical building in cold area , with fortification of 8-degree seismic intensity .

本建筑属寒冷地区的乙类高层医疗建筑，抗震设防烈度为8度。

1st class rural areas , 2nd class rural areas , 3rd class rural areas and4th class rural areas , i.e.altogether six classified areas .

一类农村、二类农村、三类农村、四类农村，共6类地区。

There are five protected species enlisted in National Protection List of Rare Animal ( 1 kind for 1st class species and 4 kinds for 2nd class species ) .

《国家重点保护动物名录》中受到保护的蝴蝶只有5种（一级保护蝴蝶1种，二级保护为4种）。

Methods Two-stage stratified random cluster sampling was used to select one large city ( Shenzhen ), one moderate city ( Zhuhai ), one 1st class rural county ( Xinxing ), one 2nd class rural county ( Lianping ) .

方法采用二阶段分层随机整群抽样方法随机抽取大城市1个市（深圳）、中小城市1个市（珠海）、1类农村1个县（新兴），2类农村1个县（连平）。

This study is of importance to the test and development of quantum chromodynamics , and provides a solid foundation for continuing experimental studies of charmonium physics at an advanced level in China . It was awarded a 2nd Class National Science Award in 2001 .

该项研究成果对量子色动力学的检验与发展具有重要意义，为我国粲偶素物理实验研究的继续发展并保持先进水平奠定坚实基础。

According to Standard for Fine Quality Rice , by Ministry of Agriculture , China ( NY / T83-1988 ), no combination reached the 2nd class standard of chalky rice rate , and the combinations reached the 1st class standard in gel consistency were rare .

结果表明，参试组合中没有一个组合的垩白率达到部颁优质米（NY/T831988）二级标准，胶稠度达到一级标准的组合比例很少；

The 2nd age class and 3rd age class tillers were minority in the population .

2龄、3龄的分蘖株数量很少。

The rhizomes of the 1st age class of two populations had not been formed by then . The cumulate length and biomass of their rhizomes were mainly the 2nd age class .

当时2种群的1龄根茎尚未形成，根茎累积长度与生物量均以2龄为主。