为什么要建立滞后变量模型？

阅读下面的文言文，完成后面小题。

晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林， 夹（jiā）岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之。复前行，欲穷其林。

林尽水源，便得一山，山有小口，仿佛若有光。便舍（shě）船，从口入。初极狭，才通人。复行数十步，豁（huò）然开朗。土地平旷，屋舍（shè）俨（yǎn）然，有良田美池桑竹之属。阡（qiān）陌（mò）交通，鸡犬相闻。其中往来种（zhòng）作，男女衣着（zhuó），悉如外人。黄发垂髫（tiáo），并怡然自乐。

见渔人，乃大惊，问所从来。具答之。便要（yāo）还家，设酒杀鸡作食。村中闻有此人，咸（xián）来问讯。自云先世避秦时乱，率妻子邑（yì）人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语（yù）云：“不足为外人道也。”

既出，得其船，便扶向路，处处志之。及郡下，诣（yì）太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。

南阳刘子骥（jì），高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。

小题1:下面加点词解释错误的一项是（ ）（3分）

A 有良田美池桑竹之属（类） B 悉如外人（熟悉）

C 便要还家（邀请） D 余人各复延至其家（邀请）

小题2:下列各项中加点词语意思相同的一项是（    ）（3分）

A 因以为号焉  自号曰醉翁也   B 先生不知何许人也   曳屋许许声

C期在必醉 与友期行          D 有良田美池桑竹之属  属予作文以记之

小题3:对本文理解有误的一项是   (      ) （3分）

A．本文是以渔人的行踪为线索。

B．本文既然名为"记"，当然就是一篇记叙性的文章。

C．“便要还家，设酒杀鸡作食”、“余人各复延至其家”表现了桃花源人热情好客的特点，因为他们害怕世人来破坏他们和平安宁的生活。

D．本文表达了作者对理想社会的热烈追求，同时含蓄地表达了对现实社会的不满。

“直线式课程”的含义

建筑上设置（）可以防止由于不均匀沉降引起的变形对建筑带来的破坏作用

A.沉降缝

B.温度缝

C.伸缩缝

D.防震缝

依我国《著作权法》的规定，下列智力创作成果中不属于作品的是( )。

A．讲稿
B．魔术
C．地图
D．杂技

It was the night of the full moon, a time which always drives Java’s young people mad with excitement.

Fireworks were lit long before the moon (1) . The big noise brought people out (2) the warm night to enjoy the interesting scene. Everywhere, there were the paper remains of (3) fireworks lying on the ground. Little boys (4) more and covered their ears as they waited (5) for the explosions.

The moon appeared above the horizon: huge, (6) ball high above the city, and the (7) filled with people, as Java began to enjoy one of the year’s greatest (8) ."the Night of the Full Moon", a festival that is especially popular (9) young people.

More and more young Javanese (10) together and walked slowly through the (11) . Joking and chatting, they moved towards the mountain (12) the city. They continued to climb (13) they reached the old temple at the (14) of the mountain.

After they were (15) the temple, they drank their water and ate their mooncakes—delicious home-made ones, (16) of dried fruit and nuts. Outside, on the mountain, young people (17) cross-legged in circles, chatting and telling each other jokes. And (18) , in their hundreds, more young people continued to make their way up the mountain to (19) the brightly shining moon.By midnight, the fireworks had stopped shooting up from the (20) city in the valley below them. But during the night, the sound continued to be heard from the distance.

20（）

A.clean 

B.gray 

C.peaceful 

D.empty