Dear Mr. Wang,

    Someone comes to the office to see you in the morning, but you and your wife are out. He comes here at 10am. Because he is very busy, he goes away half an hour later. He tells me that he is your classmate at college(大学). Now he teaches Chinese in a high school(高中) in this city and he lives near the No. 6 Middle School. He is a very tall man with short hair. He wears a pair of glasses. He tells me his telephone number is 33426685. He is often at home at 7:00 pm. So you can call him in the evening.

山西大同的云冈石窟和河南洛阳的龙门石窟是世界著名的两大石窟。石窟的雕造吸收了哪一教派的艺术（    ）

幸福在哪里？幸福像一个隐形的天使，无处不在。你拥有幸福而温暖；我凶有幸福而充满白信；他凶有幸福而自豪……

请以“幸福在身边”为题写一篇作文，体裁不限，表达真情实感，不少于600字。

①甲母减数第一次分裂中，2条X染色体未分开而是一起进入了次级卵母细胞；

②甲母减数第二次分裂中，2条X染色体未分开而是一起进入了卵细胞；

③甲父减数第一次分裂中，2条性染色体未分开而是一起进入了次级精母细胞；

④甲父减数第二次分裂中，2条性染色体未分开而是一起进入了精细胞．