心动周期中哪个时期心室内容积下降达最低值（） A.等容收缩期 B.等容舒张期 C.减

在可摘局部义齿支架弯制中，属于无卡环体，环抱稳定作用较差的卡环是（）

A.锻丝下返卡环

B.锻丝上返卡环

C.长臂卡环

D.固定卡环

E.连续卡环

对细胞的生命活动起着控制作用的结构是：

A．细胞膜

B．细胞质

C．细胞壁

D．细胞核

在急性骨髓炎时，早期最易探查到的超声征象是（）。

A.骨膜下脓肿呈现带状无回声改变，骨膜增厚呈拱形抬高表现

B.正常骨纹理消失，骨皮质回声中断

C.骨质中出现边缘不清，外形不规整的低回声区夹杂着点状强回声

D.软组织肿胀，有脓肿形成时可探到无回声区

E.脓肿穿破皮肤，形成窦道，局部软组织纹理中断

阅读理解。

     It was the perfect weather for leaf watching, and my housemate Julie and I meant to spend the weekend

with our friends in the north Georgia mountains. "Don't you want to come along?" Julie asked her 15-year-old

son, Mark. "Enjoy the leaves by yourselves," he told her. "I'll be fine staying home by myself." Julie and I drove

there in my car after work on Friday. On Saturday morning we hiked along the mountainside and enjoyed the

beautiful colors. All of a sudden, I had a terrible feeling. "Go home," a voice seemed to urge me. I couldn't

explain it, but I didn't want to be here any more. I just wanted to go home. "Carol, calm down. You're being

silly," Julie said. But the urge just got stronger. "I've got to leave," I said. "If you want to stay, you can get a

ride back with everyone else tomorrow." Julie stood up. "No, I'll go with you," she said. We almost didn't talk

during the two-hour trip back. I felt very guilty. Finally, we pulled in. The lights were on in the house, but

something was strange. The windows seemed to be fogged up. Julie opened the door and smoke poured out.

"Mark!" she shouted. "Mark!" We rushed inside and found him asleep on the sofa. Shaking him awake, Julie

grabbed him. I grabbed the source of the smoke -a pillow too close to the fireplace. I then took it outside and

threw water on it. Mark had built a fire to keep warm, and some embers (灰烬) had flown out. The whole

house could have gone up if we hadn't gotten there just then!

1. What do we know from the text? [ ]

A. Leaf watching was Mark's hobby.

B. Mark stayed home with his friends.

C. Carol went to work on Friday.

D. Mark was Carol's cousin.

2. The underlined phrase "pulled in" in the last paragraph probably means "_____". [ ]

A. started the car

B. arrived home and stopped the car

C. moved away from the station

D. came home late

3. While driving home Carol _____. [ ]

A. was very terrified

B. drove at a great speed

C. knew she had made a mistake

D. hardly said anything

4. Why did Carol want to go home? [ ]

A. She didn't enjoy the leaves.

B. She received her son's telephone call.

C. She felt something urged her to go home.

D. She followed Julie's advice.

2009年，受国际金融危机的影响，全国普通高校的毕业生的就业形势十分严峻。结构性矛盾、就业歧视、学生择业观偏差等加剧了大学生就业困境。新的就业形势对大学生的素质提出了更高要求。为了帮助大学生走上工作岗位，教育部提出了采用灵活就业、自主创业的多种渠道。

在新就业形势下，你认为大学生应如何运用物质和意识的辩证关系来指导自己做好就业与自主创业的准备？