以下程序的执行结果是 ( )。 #include ＜iostream＞ using namespace std; class sample { private: int x; public: sample (int A) { x=a; } friend double square(sample s); }; double square(sample s) {

A vessel using a traffic separation scheme shall normally join or leave a traffic lane at the （）of the lane.

If a small fire initially breaks out in the engine room bilges, in which of the following sequences should the fire extinguishing agents or systems be used?（）

Clouds that form as small white flakes or scaly globular masses covering either small or large portions of the sky are（）.

When latitude and longitude are used，these shall be expressed in（）（and decimals of a minute if necessary），north or south of the Equator and east or west of Greenwich.

业余无线电通信梅登海德网格定位系统（Maidenhead Grid Square Locator）？

Every act of assistance or salvage，which has had a useful result，should give a right to （）remuneration.

According to the author, at a big party, small talk is used with the purpose of ______.

The size of a flat-screen television is given as the length of the screen’s diagonal. How many square inches greater is the screen of a square 34-inch flat-screen television than a square 27-inch flat-screen television?

Which of the following commands will display the name of the IOS image file being used in a Cisco router?（）

（ ）estimating is a technique for estimating the duration or cost of an activity ou project using historical data from a similar activity or project.

The （） is used to measure the volume of a liquid or gas through a pipeline within any given period of time.