间谍罪的概念和构成要件是什么？

阅读理解。

     Welcome to our school.

     Our school is on Guangming Street. It,s next to the People's Library .There is a big garden across

from our school. The pay phone is between our school and the post office. There are three buildings in

our school .The students, building, the teachers, building and a library building.The teachers in our school

are very good. Our school yard is very beautiful ,If you come to our school from the airport,take a taxi

and go along the highway until you see a bridge. Go across the bridge and turn left. Then go straight along

the bridge until you see a market .Turn left and go along Guangming Street. Our school is on the right.

根据短文内容判断正（T）（F）。

( )1.Our school is between the post office and the People's Library.

(     )2.The big gargen is on Guangming Street.

(     )3.The pay phone is next to the post office.

(     )4.If you go straight along the highway ,you can get to our school.

(     )5.The market is across from our school.

井下放炮，爆破工接到起爆命令后，必须先发出（），至少再等（）时间，方可放炮。

“二战”后的欧洲，首先进行了经济上的合作；随着“欧盟”的进一步发展，“欧洲一体化”的进程也加强了政治上的合作；在经济、政治合作的基础上，更加强了科技合作，提出了建立“科技欧洲”。提出该计划的目的是[ ]

A．推动政治一体化的进程

B．加强对科学研究的支持

C．提升高科技领域竞争力

D．加速国际经济格局调整

以下关于信用证的种类的说法错误的是( )。

A．有可撤销信用证和不可撤销信用证之分，未加明确的视为不可撤销信用证

B．有保兑信用证和不保兑信用证之分，保兑是指一家银行开出的信用证由另一家银行保证付款

C．有可转让信用证和不可转让信用证之分，未加注明的为可转让信用证

D．有即期信用证和远期信用证之分

在本月28日前，供应商甲可以供给3万个螺钉，供应商乙可以供应螺钉5万个，双方的供应价格没有明显差异；已知供应商乙已经承接了XX公司的螺钉订单3万个，供应商甲目前并未接受任何订单，需要采购螺钉4万个，则应采用以下哪种下单方式对我公司最合理？（）

A.向甲公司下单3万个，向乙公司下单1万个

B.向甲公司下单2万个，向乙公司下单2万个

C.向甲公司下单1万个，向乙公司下单3万个

D.向甲公司下单2.4万个，向乙公司下单1.6万个