问题 综合

如图所示,此时ABC弧线上的太阳高度角为0°,某人正在距离B地正南方2775km的某地肉眼观测北极星.观测到的北极星平均仰角为48°。完成下列各题。(14分)

(1)此时阳光直射点的地理坐标是________。

(2)A地此日昼长约______小时,日出时间是___________

(3)B地此日正午太阳高度角为              

(4)此时东半球新的一天的范围比旧的一天________ (大、小)。

(5)此日西安(约34°N)某楼上的太阳能热水器集热板角度调整为      度时能获得最大的热量。

(6)此日,西安(34.27°N、108.9°E)当地看到太阳升落的视运动轨迹示意图为 

A                  B                      C                   D

答案

(1)北纬17°西径80°  (2)16小时   4点     

(3)34°    (4)小      (5)17°     (6)D

本题考查地球运动的相关知识。

(1)根据题意“此时ABC弧线上的太阳高度角为0°”,可知ABC弧线为晨昏线。“某人正在距离B地正南方2775km的某地肉眼观测北极星.观测到的北极星平均仰角为48°”可知在B地以南25°,且该地为48°N,100°E地方时为0时,因此B地为73°N。且73°N及其以北为极昼,太阳直射的纬度为17°N,经度为(根据100°E地方时为0时)80°W。

(2)此时A地正处在昏线上且地方时为20时,根据公式昼长=2(T日落-12)=2(20-12)=16,T日出=12-昼长/2=4

(3)根据公式正午太阳高度角H=90°-纬度差=90°-(73-17)=34°

(4)划分日期两条经线:地方时为0时经线和180°经线。新一天的范围是100°E向东到180°

(5)太阳能集热板的倾角与正午太阳高度角互余。先求出当地的正午太阳高度角H=90°-(34°-17°)=63°,所以热水器集热板倾角为17°

(6)此日是北半球的夏半年,太阳东北升,西北落。

阅读理解

1. HOUSE FOR SALE     Comfortable family home with a large garden on north side of town. Three bedrooms, living-room, kitchen, dining-room, bathroom. Offers over $ 35,000.

2. ASSISTANT WANTED FOR BUSH RESTAURANT

Some evening and weekend work. All meals free. Ring 3320178.

3. JOIN OUR FOOTBALL TEAM       Boys and girls wanted to play in local football team.

Aged 9-13. Meet in Green Park on Friday at 3 p.m.

4. ROOM to RENT (出租)

Small room to rent in city center flat above restaurant. Newly painted with modern furniture(家具). Near main railway station. Buses pass front door. Phone 3322108.

Mr. Black wants to live near his workplace. Mrs. Black wants a house with four bedrooms. Their children don’t care what the house is like as long as the garden is big enough. Rose, their daughter has always wanted to work in a restaurant. She thinks it is an exciting place. it’s hard work, but she isn’t lazy. You have to work on Sundays and Saturdays, but you get other days off. It’s not very well paid. But who cares about money?

Jack is a middle school student. He is thirteen years old. He finishes school at half past three, so he has plenty of time to finish his homework.

Bob, Mr. Black’s brother, is looking for a room to rent. He doesn’t care what color the walls are or how old the furniture is. He is getting ready for his drawing. So the house must be quiet.

小题1:Why didn’t the Blacks buy the house in Advertisement 1?

A.It was on the north side of town.

B.There weren’t enough bedrooms.

C.There was no dining- room.

D.The garden was too big.小题2:Why does Rose want to get the job in the restaurant?

A.It’s an easy job.

B.She can get a lot of money.

C.She thinks it will be interesting.

D.She can get long holidays.小题3:Why can’t Jack play for the new football team?

A.School finished too late.

B.It’s in different village.

C.He’s not old enough

D.He has to do his homework.

单项选择题