下列关于大数据的说法，不正确的是（）。A.大数据与自然资源、人力资源一样是国家、组织

下列短文的划线部分是错误的，请将其正确答案书写在后面的横线上。

How do North Americans dress? What do they wear in special              1      

days? In fact, there is very few formal days, though there are some             2_______

festivals such as Easter, Christmas, Halloween, or Thanksgiving               3      

Day. What people wear depend on their likes and dislikes. On birthday,         4      

some child wear paper party hats. At Christmas, some people wear             5      

Santa Claus hats. In winter, Canada people usually wear coats, gloves,         6      

boots and hats. It is near the same in northern China. Generally, people          7        

in Canada and the United States wear suits for work in offices, as             8      

well as for most formal occasions, just as people do in China. People           9      

in cities around a world wear rather similar clothes.                         10

当代教育学发展的趋势。

液氮速冻时下列注意事项错误的是（）

A.标本盒不能直接浸入液氮

B.速冻的包埋剂要适量

C.新鲜组织不能放入-10℃冰箱内缓慢冷却

D.冷冻后的组织块应密封保存

E.组织块复温时要自然复温

《中华人民共和国药品管理法实施条例》界定，未曾在中国境内上市销售的药品称为（）

A.中成药

B.处方药

C.制剂

D.非处方药

E.新药

以太网协议中使用了二进制指数后退算法，这个算法的特点是______。

A．容易实现，工作效率高

B．在轻负载下能提高网络的利用率

C．在重负载下能有效分解冲突

D．在任何情况下不会发生阻塞