问题 问答题

读地球公转示意图,回答下列问题:

(1)在图中用箭头标出地球公转方向.

(2)当地球公转到B位置时,正值北半球______节气,此时阳光直射在______.

(3)当地球公转到C位置时,南极圈以南地区出现______现象,莱州市的昼夜长短情况是______.

(4)我国“嫦娥一号”卫星2007年10月24日发射升空时,地球大致正运行在上图中的______(区间范围).

A.AB之间    B.BC之间    C.CD之间D.AD之间.

答案

(1)地球公转的方向是自西向东.

    (2)当地球公转到B位置时,太阳光直射在赤道上,正值北半球的春分日,时间为3月21日前后.

    (3)当地球公转到C位置时,太阳光直射在北回归线上,正值北半球的夏至日,时间为6月22日前后,南极圈以南地区出现极夜现象,北半球的昼最长夜最短.

    (4)当地球公转到D位置时,太阳光直射在赤道上,正值北半球的秋分日,时间为9月23日前后;当地球公转到A位置时,太阳光直射在南回归线上,正值北半球的冬至日,时间为12月22日前后;所以我国“嫦娥一号”卫星2007年10月24日发射升空在太空飞行时.当时地球在绕太阳公转的轨道上,大致正运行在上图中的AD之间.故选项D符合题意.

故答案为:(1)如图;(2)春分;赤道;(3)极夜;昼长夜短;(4)D.

完形填空

  小题1: Scientists and experts have proved the uniqueness of finger-prints and discovered that no exactly similar pattern is passed on from parents to children, though nobody knows why this is the case.

The ridge (隆起) structure on a person's fingers does not change with growth and is not affected by surface injuries. Burns, cuts and other damage to the outer part of the skin will be replaced in time by a new one, which bears a reproduction of the original pattern.    小题2: Some criminals make use of this fact to remove their own finger-prints but this is a dangerous and rare step to take.

Finger-prints can be made very easily with printer’s ink. They can be recorded easily.    小题3:  Because of the simplicity and economy of this system, finger-prints have often been used as a method of solving criminal case. A suspected man may deny a charge but this may be in vain.     小题4:  . When a suspect leaves finger-prints behind at the scene of a crime, they are difficult to detect with the naked eye.   小题5:   Some of the marks found are incomplete but identification is possible if a print of a quarter of an inch square can be obtained.

A.Special techniques are used to “develop” them.

B.A fingerprint is an impression of the friction ridges of all parts of the finger.

C.It is only when the inner skin is injured that the arrangement will be destroyed.

D.With special methods, identification can be achieved successfully within a short time.E. A latent print is the chance reproduction of the friction ridges deposited on the surface of an item.

F. His finger-prints can prove who he is even if his appearance has been changed by age or accident.

G. Every human being has a unique arrangement of the skin on his fingers and this arrangement is unchangeable.

多项选择题