化简：$\frac{\sqrt{1-2\sin 40°\cos 40°}}{\sin 40°+\cos 140°}$=____ 

    On Tuesday, scientists announced that they have discovered the bones of four settlers in Jamestown, Virginia. Jamestown was the first permanent English settlement in what become the United States. The bones were unearthed under the floor of a Jamestown church which was discovered in 2010 and is considered as America‘s first Protestant church.

    The Jamestown Rediscovery Foundation at Historic Jamestowne and the Smithsonian's Museum of Natural History announced that the settlers held high leadership positions. The men, Rev.Robert Hunt,Capt. Gabriel Archer,Sir Ferdinando Wainman,and Capt. William West, all played a role in the Jamestown settlement. After being lost to history for more than 400 years, the discovery of their remains provides new clues about their life and the importance of religion in the 1600s.

    “This is a very important discovery,” Jamestown Rediscovery Foundation President James Horn said in a statement. “These men were among the first founders of English America."

    About 100 people settled along the James River in what would become the first English settlement m 1607. During that time, settlers in Jamestown were faced with famine and disease The colony was nearly wiped out due to conflict with Native Americans in the area and with other English settlers.

    "They lived and died at a hard time in the history of the settlement , when Jamestown almost ended in  failure," Horn said. “The bones of these men help fill in the stories of their lives ”

    The Smithsonian and the Rediscovery Foundation found the remains in November of 2013. Scientists used 3-D technology to locate the exact gravesites of the men. The team wanted to identify its findings before announcing the discovery. They identified the men using historical records and studied the chemicals of the bones to learn what the men ate and where they came from.

    Findings from the burials will go on display within weeks at Historic Jamestowne. The site also plans to honor the men and will keep their bones in a safe place for future study.

阅读下面短文，根据所读内容在表格中的空白处填入恰当的单词。注意：每个空格只填一个单词。

       Put a group of strangers in a room together, and they'll probably start a conversation. "Hot today, isn't it?"one might say. "You said it." another replies.

       Why do we talk so much about the weather? When we meet new people, we don't begin by telling them our life story. We start with small talk, a polite conversation about something like traffic or weather.

       Research suggests that small talk can build new friendships. When we begin conversations with new people, we want to feel comfortable, and so do they. We use small talk to find common interests. Once we have a common interest, a friendship can begin.

Small talk even helps people get hired. In order to impress at a job interview, you need to bond with the interviewer right away. Proper small talk can make that first impression get you the job.

        So, how can you make small talk lead to a new friendship or job? First off, find common ground. Select something around you that you share with the other person.

        Next, keep the conversation going. Compliment (赞美) the other person to make himor her feel comfortable, and ask questions to show interest.

        Third, keep eye contact (接触). When you look people in the eye, they feel you appreciate what they are saying. It makes you appear honest and builds trust.

         Naturally, shy people might not have enough confidence to start up conversations with strangers. Talking to someone you don't know is not the easiest thing to do! Some experts say with more practice, small talk does get easier.

         Some people avoid small talk because they dislike discussing things like traffic or weather. For them, they are just too small. However, when you think about it, small talk is anything but small. In fact, it is actually a very big deal!