目前杭州共有世界遗产（）项。 A.1 B.2 C.3 D.4

达尔文认为，生物产生了变异以后，决定其生存或淘汰的是（　　）

A．自然选择

B．遗传因素

C．繁殖能力

D．食物多少

I got a job teaching special education at a school in Coachella, California, a desert town about 170 miles from home. It was no (1) job. Street gangs (2) around the school after dark.

"Be careful, " Dad warned me during one of my frequent weekend (3) home. He was concerned about my living (4) , but I needed to be on my own.

One evening, I stayed after school to rearrange my classroom. (5) , I turned out the light and closed the door. Then I (6) toward the gate. It was (7) ! I looked around. Everyone had gone home.

After (8) all the exits, I found just enough (9) to squeeze under a gate in the back of the school. Then I walked toward my car, parked in a field behind the building.Suddenly I heard voices. I (10) around and saw at least eight boys following me. (11) my pace, I reached into my shoulder bag to get my key. I (12) all over the inside of my handbag. But the key wasn’t (13) ! Dear Lord, please help me, I prayed (14) . Suddenly, my fingers touched a loose key in my purse. I didn’t even know if it was for my car, but I took it out and (15) it. It worked!I opened the door, slid in and locked it—just (16) the teenagers surrounded the car. Trembling , I started the engine and (17) away. When I returned to my apartment, the phone was ringing. It was my Dad. I didn’t tell him about my experience; I didn’t want to (18) him. "Oh, I forgot to tell you!" He said, "I had a (n) (19) car key made and slipped it into your purse—just (20) you ever need it.

1（）

A.dream 

B.difficult 

C.exciting 

D.heavy

在当前的音像市场上，正版的激光唱盘和影视盘销售不佳，而盗版的激光唱盘和影视盘却屡禁不绝，销售异常火爆。有的分析人员认为，这主要是因为在价格上盗版盘更有优势，所以在市场上更有活力。
这说明( )。

A．正版的激光唱盘和影视盘往往内容呆板，不适应市场的需要

B．与价格的差别相比，正版与盗版在质量方面的差别不大

C．盗版的激光唱盘和影视盘比正版的盘进货渠道畅通

D．正版的激光唱盘和影视盘，不如盗版盘销售网络完善

企业应当根据（）要求，科学规范不同级次内部报告的指标体系。

A、发展战略

B、风险控制

C、业绩考核

D、领导层

人类历史进程的各个阶段，如石器时代、铁器时代、蒸汽时代、电气时代等各个时代的主要的动力来源分别是人力、（）、燃煤的动力、电力。