An instrument that indicates wind direction is known as a(n)

The numeral in the center of a wind rose circle on a pilot chart indicates the ______.

A.total number of observations

B.average wind force on the Beaufort scale

C.average wind force in knots

D.percentage of calms

When recording the wind direction in the weather log，you would report the ______．

A.direction the wind is blowing toward

B.direction the wind is blowing from

C.duration of the maximum gust of wind

D.wind chill factor

SHIFT OF WIND DIRECTION IN AN ANTICLOCKWISE MANNER, FOR EXAMPLE FROM NORTH TO WEST ( OPPOSITE OF VEERING ) defines ______.

A.Backing (of wind)

B.Veering (of wind)

C.Shifting of wind

D.altering of wind

Changing direction by bringing the stern of the vessel through the eye of the wind is known as _______.

A.jibing

B.running before the wind

C.Reefing

D.tacking

A wind vane on a moving vessel shows ______.

A.dead reckoning wind direction

B.true wind direction

C.apparent wind direction

D.estimated wind direction

The best estimate of the wind direction at sea level can be obtained from observing the direction of the ______.

A.cloud movement

B.vessel heading

C.waves

D.swells

You are located within a stationary high pressure area．Your aneroid barometer is falling very slowly．This indicates a（n）______．

A.Wind shift of 180°

B.Large increase in wind velocity

C.Decrease in the intensity of the system

D.Increase in the intensity of the system

阅读以下说明和Java程序，填补代码中的空缺（1）～（5），将解答填入答题纸的对应栏内。 【说明】 对部分乐器进行建模，其类图如图6-1所示，包括：乐器（Instrument）、管乐器(Wind)、打击乐器( Percussion)、弦乐器（Stringed）、木管乐器（Woodwind）、铜管乐器（Brass）。图6-1 类图 下面是实现上述设计的Java代码，其中音乐类（Music）使用各类乐器（Instrument）进行演奏和调音等操作。

【Java代码】 enum Note{ /* 枚举各种音调 */ MIDD[LE_C, C_SHARP, B_FLAT; //其他略 } interface Instrument { /* 接口，乐器 */ （1） ; //play方法接口 void adjust() ; //adjust方法接口 } class Wind （2） { public void play(Note n) { System.out.println("Wind.play()"+n); } public void adjust() { System.out.println("Wind.adjust()"); } } /* 类Percussion和Stringet实现代码略 */ class Brass （3） { public void play(Note n) { System.out.println("Brass.play()"+n); } public void adjust () { System.out.println("Brass.adjust()"); } } class Woodwind extends Wind { public void play (Note n) { System.out.println("Woodwind.play()"+n); } } public void tune(Instrument i) { i.play(Note.MIDDLE_C); } void adjust(Instrument i) { i.adjust(); } void tuneAll （4） e ) { class Music { for(lnstrument i : e) { adjust(i); tune(i); } } public static void main(String[] args) { Music music= （5） Music(); Instrument[] orchestra={ new Wind(), new Woodwind() }; music.tuneAll(orchestra); } 奉程序运行后的输出结果为： Wind.adjust() Wind.play() MIDDLE_C Wind.adjust() Woodwind.play() MIDDLE_C

An anemometer on a moving vessel measures ______.

A.apparent wind speed only

B.true wind speed and true wind direction

C.true wind speed only

D.apparent wind speed and true wind direction

In the Northern Hemisphere a wind is said to veer when the wind ______.

A.changes direction clockwise, as from north to east, etc

B.changes direction counterclockwise, as from south to east, etc

C.changes direction violently and erratically

D.remains constant in direction and speed