问题 单项选择题 B1型题

伯道疏螺旋体的传播媒介是()。

A.蚊

B.蝗

C.蚤

D.虱

E.螨

答案

参考答案:B

解析:1.斑疹伤寒立克次体生存在大鼠、小鼠和其他啮齿动物的寄生虫内。 2.登革热是一种由蚊子传播的急性热带病毒性疾病。病原体为登革热病毒。 5.呼吸道传播是最主要的传播途径。Q热立克次体随动物尿粪、羊水等排泄物以及蜱粪便污染尘埃或形成气溶胶进入呼吸道致病。

阅读理解

任务型阅读。

请认真阅读下列短文,并根据所读内容在文章后表格中的空格里填入一个最恰当的单词。

                                                "Happiness Advantage" Effect

     In July 2010 Burt's Bees, a personal-care products company, was going through enormous

change as it began a global expansion into 19 new countries. In this kind of high-pressure situation,

many leaders bother their assistants with frequent meetings or flood their in-boxes with urgent

demands. In doing so, managers lift everyone's anxiety level, which activates the part of the brain

that processes threats and steals resources from the prefrontal cortex ( 大脑皮层), which is

responsible for effective problem solving.

     Burt's Bees's then-CEO, John Wolfgang, took a different approach. Each day, he'd send out an

e-mail praising a team member for work related to global marketing. He'd interrupt his own

presentations to remind his managers to talk with their teams about the company's values. He asked

me to further a three-hour session with employees on happiness in the course of the expansion effort.

As one member of the senior team told me a year later, Wolfgang's emphasis on developing positive

leadership kept his managers actively involved and loyal as they successfully transformed the

company into a global one.

     That outcome shouldn't surprise us. Research shows that when people work with a positive

mind-set (思维模式), performance on nearly every level-productivity, creativity, involvement-

improves. Yet happiness is perhaps the most misunderstood driver of performance. For one, most

people believe that success comes before happiness. "Once I get a promotion, I'll be happy," they

think. Or, "Once I hit my sales target, I'll feel great. "But because success is a moving target-as

soon as you hit your target, you raise it again-the happiness that results from success does not last

long.

     In fact, it works the other way around: People who have a positive mind-set perform better in

the face of challenge. I call this the " happiness advantage"-every business outcome shows

improvement when the brain is positive. I've observed this effect in my role as a researcher and

lecturer in 48 countries on the connection between employee happiness and success. And I'm not

alone: In an analysis of 225 academic studies, researchers found strong evidence of cause-and-effect

relationship between life satisfaction and successful business outcomes.

     Another common misunderstanding is that our genetics, our environment, or a combination of

the two determines how happy we are. To be sure, both factors have an impact. But one's general

sense of well-being is surprisingly unstable. The habits you form, the way you interact with

colleagues, how you think about stress-all these can be managed to increase your happiness and

your chances of success.

填空题

(15分)Ⅰ某化学过程的示意图如图所示。在装置工作过程中,甲池的总反应式为:

试回答下列问题:

(1)甲池溶液中的移向       (填“a”或“b”)电极,

乙池溶液中的移向    (填“ A”或“B”)电极;

(2)电极a上发生的电极反应式为                               

(3)乙池中发生反应的离子方程式为                               

(4)当电极A处得到0.71g产物时,甲池中理论上消耗       (标准状况下)。如何检验A处的产物                                                         

Ⅱ某研究性学习小组对铝热反应实验展开研究。现行高中化学教材对“铝热反应”的现象有这样的描述:“反应放出大量的热,并发出耀眼的光芒”、“纸漏斗的下部被烧穿,有熔融物落入沙中”。查阅《化学手册》知, 熔点、沸点数据如下:

物质Al
熔点/℃66020541531462
沸点/℃246729802750-
(1)      某同学推测,铝热反应所得到的熔融物应是铁铝合金。理由是:该反应放出的热量使铁熔化,铝的熔点比铁低,此时液态的铁和铝熔合形成铁铝合金。你认为他的解释是否合理         (填“合理”或“不合理”)

(2)      用一个简单的实验方案,证明上述所得的块状熔融物中含有金属铝。该实验所用试剂          ,反应的离子方程式为                            

(3)      实验室溶解该熔融物,下列试剂中最适宜的试剂是      

A.浓硫酸        B.稀硫酸       C.稀硝酸        D. 氢氧化钠溶液