下列各项艺术成就中，不属于东晋时期的是[ ] A．《女史箴图》 B．《洛神赋图》

Dear Mrs. Johnson,

It is a pleasure to write this letter because it gives me an opportunity to tell you how much I enjoyed my stay with your family last week. It was my first visit to an American family and, at first, 小题1: _________________. When I saw you and your children waiting for me at the station with warm smiles of welcome on your faces, 小题2: _________________. You and your wonderful family put me at ease right away.

There are many happy memories of the weekend, and I will keep them with me forever. Above all, I will remember that you made me feel at home. There were so many new and different things for me to see and do. I particularly enjoyed driving through the countryside with Mr. Johnson and you and seeing the charming colors of the leaves on the trees. I liked playing baseball with your sons, Jimmy and Joey. 小题3:________________. Tell them I will teach them how to play soccer next time. I also had a good time at the city square dance on Saturday night. It was my first square dance, and I cannot forget how friendly and kind everyone around was.

I am back at school again now and I am very happy because I know now a real American family and it is one of the nicest families I have ever met. Because my English is still not very good, 小题4:_______________________. I can only say "Thank you" and hope that someday you will visit my country and I can return your hospitality (款待).

Yours sincerely

Jack

She has already tried her best. Please don't be too ________ about her job.[ ]

A. special  

B. responsible

C. unusual  

D. particular

导致心肌炎最主要的病原体是（）

A.病毒

B.细菌

C.药物中毒

D.螺旋体

E.寄生虫

对于苯乙烯（结构如图）的下列叙述中：①能使酸性KMnO₄溶液褪色；②可发生加聚反应；③可溶于水；④可溶于苯中；⑤能与浓硝酸发生取代反应；⑥所有的原子可能共平面，其中正确的是（　　）

A．仅①②④⑤

B．仅①②⑤⑥

C．仅①②④⑤⑥

D．全部正确

以下哪一项是急性胆囊炎与慢性胆囊炎的鉴别点之一

A.增厚的胆囊壁 

B.胆囊增大，壁轻度厚 

C.胆囊内结石回声 

D.胆囊腔变小 

E.超声莫非氏征阳性