劳动法也是职业教育的根本大法。

     阅读下面短文，根据上下文意义和所给单词首字母，写出标有题号的每小题空白处适当单词的

完全、正确形式。

     When I was l3 years old, a boy gave me an important gift.

      It was a (1)s______. It was the early autumn of my first year at a junior high school, and my old school

was far away. As a result, no one (2)k______ who I was. I was very lonely, and afraid to make friends with

(3)a______.

     Every time I heard the other students talking and (4)l______, I felt my heart break. I couldn't talk to anyone

about my problem, and I didn't want my parents to (5)w______ about me.

     Then one day, my classmates talked happily with their friends, but I sat at my desk unhappily as (6)u______.

At that moment, a boy (7)e______ the classroom. I didn't know who he was. He (8)p______ me and then

turned back. He looked at me and, without a (9)w______, smiled.

     Suddenly, I felt the touch of something bright and friendly. It (10)m______ me feel happy, lively and warm.

     That smile (11)c______ my life. I started to talk with the other students and made friends.

     Day by day, I became more active and (12)c______ to everyone in my class. The boy with the lucky

smile has become my best friend now.

     One day, I asked him (13)w______ he smiled, but he couldn't remember smiling at me!

     It doesn't matter even if he didn't tell me the reason. because all the dark days have gone. Now I believe

that the world is (14)w______ you think it is. If you think you are lonely, you might always be (15)a______.

So smile at the world and it will smile back.

将两个定值电阻R₁、R₂并联在电压为U的电源两端，R₁消耗的功率为P₁，R₂消耗的功率为3P₁，当把它们串联在电压为4U的电源两端时，下列说法正确的是[ ]

A．R₁两端的电压为U

B．R₂消耗的功率变小

C．通过R₂的电流变小

D．两个电阻消耗的总功率为12P₁

下图是某一微粒的布朗运动路线图。若t＝0时刻它在O点，然后每隔5s记录一次微粒位置(依次为a、b、c、d、e、f)，最后将各位置按顺序连接而得到此图。下述分析中正确的是(　　)

A．线段ab是微粒在第六秒初至第十秒末的运动轨迹

B．t＝12.5s时刻，微粒应该在bc线上

C．线段Oa的长度是微粒前五秒内的位移大小

D．虽然t＝30s时微粒在f点，但它不一定是沿ef方向到达f点的

支气管哮喘的临床症状主要是（）

A.吸气性呼吸困难

B.反复发作，阵发性，呼气性呼吸困难

C.反复发作，混合性呼吸困难

D.夜间阵发性呼吸困难

E.肺部有较多的哮鸣音

科学技术是第一生产力，而（）则是现代经济的核心，科技创新能力与金融发展水平是衡量一个国家竞争力的两大关键要素。

A.生产力

B.金融

C.科技

D.劳动力