太阳能电池制造的最后一道工序是（），一般采用（）。

阅读理解

       A new study has found no evidence that sunscreen, commonly used to reduce the risk of skin cancer, actually increase the risk.

       Researchers from the University of Iowa based their findings on a review of 18 earlier studies that

looked at the association between sunscreen use and melanoma (黑素瘤). They said that they found flaws in studies that had reported associations between sunscreen use and higher risk of melanoma.

       Most health experts believe that by protecting the skin from the harmful effects of the sun, sunscreen

helps prevent skin cancer, which is increasing in incidence (发生率) faster than any other cancer in the

United States.

       But questions has been raised about sunscreen and whether it may has opposite effect, perhaps by

allowing people to remain exposed to the sun longer without burning.

       The researchers said that among the problems with some earlier studies is that they often failed to

take into account that those people most at risk for skin cancer-people with fair skin(白皙的肤色) and

freckles (雀斑), for example-are more likely to use sunscreen. As a result, it may appear that sunscreen

users get cancer more often.

       The studies, which generally relied on volunteers to recall their sunscreen use, were also unable to

prove how well the products had been applied, said the new study.

1. The underlined word "flaws" in the 2nd paragraph most probably means          .

A. evidence

B. facts

C. faults

D. failures

2. People with fair skin and freckles         .

A. seldom use sunscreen

B. are more in danger of skin cancer

C. can be free from the harm of the sun

D. often expose themselves to the sun

3. We can learn from the passage that         .

A. sunscreen users get skin cancer more often

B. the volunteers have proved the effect of sunscreen

C. the new study was based on the experiences of volunteers

D. the number of skin cancer patients is increasing in America

4. Which of the following can be the title for this passage?

A. Sunscreen to Prevent Skin Cancer

B. Sunscreen to Increase Skin Cancer

C. Skin Cancer Caused by Sunscreen

D. Skin Cancer Caused by Freckles

给出下列代码，如何使成员变量m被方法fun( )直接访问Class Test{private int m；public static void fun( ){} }

A．将private int m改为protected int m

B．将private int m改为public int m

C．将private int m改为static int m

D．将private int m改为int m

风口安装应符合的要求包括( )。

A．为了使风口在室内保持整齐，室内安装的同类型风口应对称分布，同一方向的风口，其调节装置应在同一侧

B．对于矩形风口要控制两对角线之差应不大于2mm，以保证四角方正

C．在安装风口时，应注意风口与所在房间内线条的协调一致，尤其当风管明装时，风口应服从房间的线条

D．净化系统风口安装前应清扫干净，其边框与建筑顶棚或墙面间的接缝应加密封垫料或填密封胶，不得漏风

E．铝合金条形风口的安装表面应平整、线条清晰，无扭曲变形，转角、拼缝处应衔接自然，且无明显缝隙

信息的生命周期包括要求、（）、服务和退出四个阶段。

A、设计

B、发现

C、获得

D、产生

ISO9004是（）和（）要素指南。