材料一：2017年4月1日国家决定设立雄安新区，集中疏解北京非首都功能。雄安新区是我国继深圳经济特区和上海浦东新区之后又一具有全国意义的新区，将建成国际一流的绿色、现代、智慧城市

材料二：左图是海河水系流域和水利示意图，右图是左图中虚线框放大图。表1是2016年京、津、冀三地产业结构表。

    It's well-known by all the people to greet friends with a smile and a wave.____ However, what happens if your face and body send mixed messages? Would someone tend to believe the look on your face or the way you behave?

    Recently, scientists have dealt with these questions. They found that when a person is staring at your face, he might not believe what he sees if your body doesn't match the feeling that your face shows.____ Previous study had showed that the tone of a person's voice can be more important than the words spoken. For example, most people are more likely not to believe a person who says in a flat voice, “I'm so excited.”

    When talking about emotions conveyed by facial expressions and body language, most scientists suspected that the face was more important. To test if this was true, psychologists from the Netherlands and Boston showed people a number of pictures of isolated faces and isolated bodies that showed anger or fear.____

    An angry face had low eyebrows and tight lips. A frightened face had high eyebrow and a slightly open mouth.____A scared body had arms forward and shoulders square, as if ready to fight back.

These results told the researchers that mixed messages can confuse people. Even when people pay attention to the face, body language surely influences the emotion they read.

    ____And if you want to be understood it helps to avoid sending mixed messages.

A. Studying such mixed messages is nothing new for scientists.

B. So, your body language is important for telling people your feelings.

C. Scientists feel new to study the mixed message that puzzles people.

D. An angry body had arms back and shoulders at an angle, as if ready to fight.

E. Body language can sometimes be misunderstood in different culture backgrounds.

F. They also showed pictures where angry or scared faces were paired with angry or scared bodies.

G. When doing this, your face and body work together to show your friends that you are happy to see them.

己知命题 “$\exists x\in R,$使$2x^2+(a-1)x+\frac{1}{2}\le 0$”是假命题，则实数a的取值范围是(  )

    Mrs. Brown was tired after her day's shopping in London, so she went into a restaurant for a cup of tea 1 catching the train home. When she had ordered her tea, she suddenly remembered that she had to buy some 2 for her husband, who had a cough.

    “Is there a chemist's near here?” she asked the waiter. “Yes, madam.” the waiter said. “It's only about three minutes' walk away. Turn right when you go out of the restaurant, then take the second turning to the left. You'll find a big chemist's about a hundred yards up the road on the right-hand side. It closes at five, but if you 3, you'll just get there in time.”

    Mrs. Brown followed the waiter's directions 4 and found the chemist's shop without any difficulty. She bought the cough mixture and started to 5 her way back to the restaurant. But after she had walked for about ten minutes and there was still no 6 of the restaurant, she realized that she must have made a mistake.

    “Oh! I am 7!” said Mrs. Brown. “I've left all my shopping in the restaurant and now I'm lost.”

    She was still wondering what to do when a policeman came 8 and asked if he could help. Mrs. Brown 9 what had happened.

    “Well, first of all,” said the policeman, “we had better go back as far as the chemist's”. “Now,” suggested the policeman, when they got to the chemist's, “let's go in this direction. It leads to the main road, where we shall probably find your restaurant.” When they reached the main road, the policeman said, “I think you'll find the restaurant you are looking for along there, on the opposite side of the road.” Mrs. Brown thanked the policeman for his help. “I can't 10 how I went wrong,” she said. The policeman smiled. “It's quite easy,” he said, “to get lost in a big city like London.”

某生物兴趣小组在密闭玻璃温室内进行植物栽培实验，他们对温室内CO₂含量、O₂含量及CO₂吸收速率进行了24h测定，得到如图曲线，则以下说法中正确的是（　　）