在DNA的双螺旋模型中A．两条多核苷酸链完全相同 B．一条链是左手螺旋，另一条链是右

赤潮作为一种自然现象虽然自古就有，但是随着工农业生产的迅速发展，水体污染日益加重，赤潮也日趋严重。近年来，人们采取了一系列治理措施，取得了明显效果。从尊重客观规律与发挥主观能动性的角度看[ ]

A、赤潮不能消灭但能有效扼制

B、赤潮不能消灭也不能扼制

C、人类总有一天能够消灭赤潮

D、赤潮治理必须尊重客观规律

假设2011年生产一件A产品需要8小时，市场售价为9元。如果2012年，生产A产品的社会劳动生产率提高5 0%，同时通货膨胀率为20%，那么一件A产品的价格为 [ ]

A．6元  

B．7．5元

C．5元  

D．7．2元

“猴子捞月”(图)是同学们熟知的故事，猴子之所以捞不到“月”，是由于___________ 缘故．

滚动轴承有何缺点？

Prep. & Adv.

1. I can’t hear the radio very well. Can you turn it ___________ a bit?

2. The club was so noisy that we had to shout ___________ the top of our voice.

3. She goes to the greengrocer’s in the afternoon and buys the vegetables ___________ a lower price than in the morning.

4. He wrote a letter to apply ___________ the job he read in the newspaper ad.

5. It’s considerate of the hospital to provide a playroom ___________ the children.

6. We would welcome your comment ___________ our work.

7. It’s ___________ the traffic rules to park here. You’ll get a traffic ticket if you do so.

8. The weather forecast says the rain will stop ___________ the end of this week.