给定年份，下列程序用来判断该年是否是闰年，请填空。　　Sub YN( )　　　　Di

男性，54岁，l0年来上腹部胀闷不适，近l年来加重，且发现下肢浮肿，牙龈易出血。查体：面色灰褐，巩膜轻度黄染，双前臂可见蜘蛛痣，腹部膨隆，可见静脉曲张，血流方向为脐以上向上，脐以下向下，肝肋下未触及，脾肋下2指，腹部移动性浊音(+)，液波震颤(+)，下肢凹陷性浮肿。临床可能的诊断是()

A.上腔静脉阻塞

B.下腔静脉阻塞

C.慢性肝炎

D.门脉性肝硬化

E.多囊肝

病历摘要：患者女性，年龄38岁，右眼球向前突出伴视力下降半年，检查右眼球向正前方突出，眼球运动不受明显影响，眶缘未能扪及实质性物体。家族中无类似病史，否认有眼外伤史，无生吃食物及用草药湿敷右眼病史。

从病史与初步检查来分析，可能是下列何种疾病（）

A.眼内肿瘤

B.眶内肿瘤

C.眼外肌麻痹

D.眼部炎症

E.高度近视眼

F.眼球后血肿

G.全眼球炎

H.白血病眼眶浸犯

An Invisible Smile

Mr. Dawson was an old grouch, and everyone in town knew it. Kids knew not to go into his yard to pick a delicious apple. Old Dawson, they said, would come after you with his gun.

One Friday, 12-year-old Janet was going to stay all night with her friend Amy. They had to walk by Dawson's house on the way to Amy's house, but as they got close, Janet saw him sitting on his front porch and suggested they cross over to the other side of the street. Like most of the children, Janet was scared of the old man.

Amy said not to worry. Mr. Dawson wouldn't hurt anyone. Still, Janet was growing more nervous with each step closer to the old man's house. When they got close enough, Dawson looked up with his usual frown (皱眉), but when he saw it was Amy, a broad smile changed his entire face as he said, "Hello Miss Amy. I see you've got a little friend with you today."

Amy smiled back and told him Janet was staying overnight and they were going to listen to music and play games. Mr. Dawson said that sounded fun, and offered them each a fresh picked apple off his tree. They gladly accepted. Mr. Dawson had the best apples in the whole town.

When they left, Janet asked Amy, "Everyone says he's the meanest man in town. How come he was so nice to us?"

Amy explained that when she first started walking past his house he wasn't very friendly and she was afraid of him, but she pretended he was wearing an invisible smile and so she always smiled back at him. It took a while, but one day he half-smiled back at her.

After some more time, he started smiling real smiles and then started talking to her. Just a "hello" at first, then more. She said he always offers her an apple now, and is always very kind.

"An invisible smile?" questioned Janet.

"Yes," answered Amy, "my grandma told me that if I pretended I wasn't afraid and pretended he was smiling an invisible smile at me and I smiled back at him, sooner or later he would really smile. Grandma says smiles are contagious."

If we remember what Amy's grandma said, that everyone wears an invisible smile, we too will find that We're always on the go trying to accomplish so much, aren't we? It's so easy to get caught up in everyday life that we forget how simple it can be to bring cheer to ourselves and others. Giving a smile away takes so little effort and time, let's make sure that we're not the one that others have to pretend to be wearing an invisible smile.

小题1:Kids were scared of Mr. Dawson because _____.

A．he was wearing an invisible smile

B．he would fire them with a gun

C．he was mean with his apples

D．he was always very cold小题2:We can infer from the passage that_____.

A．Janet was so lovely a girl that Mr. Dawson couldn't resist her smiles

B．Janet and Amy were going to invite Mr. Dawson to listen to music and play games

C．Mr. Dawson was friendly to Amy because she always wore an invisible smile

D．it was Grandma's advice that helped bring Amy and Mr. Dawson closer小题3:The underlined word "contagious" in Paragraph 9 means _____.

A．infectious

B．supportive

C．moving

D．meaningful小题4:What is the main message that the writer intends to send us readers?

A．Always wear an invisible smile.

B．Smile whenever we can.

C．Try our best to transform others.

D．Pretend that we are happy even if we are not.

在施工时用石灰罩墙面时，为避免收缩，其正确的调剂方法是掺入( )。

A．适量的纸筋

B．适量盐

C．适量的石膏

D．适量白水泥

农业技术经济效果资料收集的一般要求（）

A、资料的目的性

B、资料的系统性

C、资料的适时性

D、资料的代表性