连续用药一段时间后，药效逐渐减弱，须加大剂量才能出现药效( )。 A．交叉耐受性

（3a²-2a-5）+（______）=a²-7a+9．

When I walked into the house after school, the first thing I noticed was a box with items I recognized from my dad’s office.

“What are you doing home already?” I asked casually.

“Andrew, I was laid off today.” he answered quietly.

I was sure he was joking. “No, you weren’t. Why are you really home?”

Then I noticed his seriousness and realized he was telling the truth. My father has always been a hard worker and prided himself on his career. Providing for our family has been his joy, and I guess I had taken his work for granted.

My father’s unemployment created many changes in our lives. For starters, he was home all the time, which meant my bed had to be made, my room cleaned up, and my homework done right after school. I would come home every day to find him at the computer searching for jobs. I began to notice how down he seemed, and how losing his job had affected his self-esteem, though he tried to be optimistic. For the first time, I saw my dad as vulnerable. He asked my brother and me to spend less. I gave up my allowance, which even though it wasn’t much, felt like the right thing to do. I also found a part-time job.

After several difficult months of searching, my dad decided to go in a totally different direction. He explained that he never wanted to be laid off again, so he was going to start his own business. Day by day, I watched him build it, and I admired how much time and energy he expended.

One evening I asked if he needed help.

“Only if it doesn't interfere with school,” he said.

I showed up at his office the next afternoon, and most afternoons after that for two months. I always knew he was a hard worker, but watching him in action really impacted me. Although this was one of the worst experiences for our family, it taught me a lot about dealing with adversity. Now I know that through creative problem-solving, I can always find Plan B, ask for help, and take risks. What I have learned from my dad’s understanding of business and his work ethic are two of the most important lessons I will ever learn, and will be my foundations for success.

1. The author’s father stayed at home because ________.

A. he had to help with the author’s lesson

B. he had been unemployed by his company

C. heavy housework was waiting for him to do

D. he wanted the author know the truth?

2. What made the author know the truth?

A. The box from his dad’s office                         B. His father’s words

C. His father’s expression                                          D. Being informed by his family

3. The author’s attitude toward his father’s former job was ________.

A. unconcerned                      B. sympathy                 C. doubt                D. tolerance

4. By saying “Only if it doesn't interfere with school”, the author’s father seemed ________.

A. to refuse the author’s advice on the new business

B. to show his discontent with the author’s schoolwork

C. to have said yes to the author’s offer of help

D. to be looking forward to the author’s good behavior at school

5. It can be inferred from the text that ________.

A. the author’s father was more optimistic to stay at home

B. the author couldn’t put up with his dad’s own business

C. the author’s father offered little allowance to the author

D. the author benefited from his father on how to deal with adversity

文化的演变有自身规律。如果不尊重文化进化的自然规律，所谓建设文化就可能变成戕害文化。拿现在人们纷纷说要复兴的国学为例。据学者研究，中国历史上国学最繁荣的时期有三个：春秋战国、魏晋南北朝、清末民初。这三个时期有一个共同特征，那就是权威破碎，人们思想上的禁锢被打破，因此进发出灿烂的创造之光。文化需要繁荣和发展，但如何给文化发展一个宽松的环境，如何更加解放思想，也许是更需要我们各方人士共同思考研究的问题。
这段文字意在说明______。

A．文化的发展应尊重其自身的进化规律
B．应给文化的发展创造一个更加宽松的环境
C．国学的复兴需要解放思想，体现创造性
D．应继承和发扬传统文化，使其再焕光彩

最有助于慢性肾炎与高血压病肾损害鉴别的检查是（）

A.尿常规

B.肾功能

C.血常规

D.肾穿刺病理检查

E.血压水平监测

患者肛门周围红肿疼痛5天，高热身痛，时有神昏谵语，口渴喜饮，腹胀便秘。检查：截石位肛门5点处见6cm× 3cm肿块，表面灼热，无波动感。舌红绛，苔黄燥，脉弦数。其证型是

A．热毒炽盛

B．热毒夹瘀

C．阴虚毒恋

D．火毒蕴结

E．湿热下注