The students in a certain physical education class are on either the football team or the basketball team, are on both these teams, or are not on either team. If 12 students are on the football team, 15 students are on the basketball team, 8 students are on both teams, and 9 students are not on either of these teams, how many students are in the class?

When a ship in loaded condition floats at arbitrary water line, its displacement is to the relevant mass of water displaced by the ship（）

While cranking out a quadrantal davit，slippage of the quadrant due to excessive wear or failure of the teeth in the quadrant will cause the（）.

These are the principles, however formulated, for which all good men and women throughout the world,（）of race or creed, education, social position, or occupation, are standing.

常见GSM-R网络的无线网络覆盖有（）种。

The cubic inch(or liter) displacement of a cylinder is determined by the diameter of the piston and the （）

在《城市道路交通规划设计规范》中规定，城市道路交通发展战略规划包括城市道路交通发展战略规划和城市道路交通综合网络规划，其中城市道路交通综合网络规划不包括（）。

The crank chamber oil （）.

某地GSM网络基站搬迁实施后发现各种覆盖问题，引起客户不满。作为网络规划工程师，请简述在搬迁工程中， （1）在网络割接之前，网络规划优化工程师需要收集和采集哪些原有网络的内容？ （2）从网络规划优化的角度，在网络搬迁工程的网络规划中，应该注意哪些方面的内容，才能保证网络搬迁后的网络质量？

The master may bind the Shipowner or Charterer（）doing such things as are necessary on the part of the one or of the other to carry out the contract.

中国GSM网络已成为全球第二大网络，第一大网则是美国GSM网络。（）

Excessive clearances in the main or crank-pin bearings will sometimes be indicated by （） before any bearing knock is heard.