无人机左侧风中起飞，侧风有使飞机机头向偏转的趋势（） A.左 B.右 C.视风速的大

若点（p，q）在|p|≤3，|q|≤3中按均匀分布出现，则方程x²+2px-q²+1=0无实数根的概率是______．

如右图所示，是一个既能吹热风，又能吹冷风的电吹风的简化电路，其中A是吹风机，B是电热丝。如果只闭合开关S₁，吹出的是      （填“冷”或者“热”）风；如果闭合开关S₁、S₂，吹出的是      （填“冷”或者“热”）风。

All of my childhood and early, adult life, my mom weighed over 220 pounds (one pound =" 0.454" kilograms). I could feel the pain that my mom experienced with her fatness.

I was never uncomfortable about my mother, but I think she was uncomfortable about herself, and that feeling was painful for all of us. And she began to lose weight.

After more than twenty years of battling obesity（肥胖）, my mother completed a forceful eighteen-month diet that left her ninety pounds lighter than before. A new woman was born! At age twenty-eight, I got a new mom! For the first time, I met the woman my mother truly was, the beautiful little lady under the fatness. It wasn’t so much her new body that was the surprise, but rather her new spirit.

To celebrate her new size and to devote herself to dancing again, my mother joined a “Mrs. Forty-Plus” competition, where she would have to model, give a speech and provide a dance performance. She told our family that she did not care if she won — she simply had always wanted to perform on stage.

She told each one of us, “I’m not doing it to win; I’m doing it to dance!”

The competition was exciting! I prayed that my mom would win, but while watching her on stage I was simply overjoyed just by her effort. To me, she had already won. She posed to perfection, her speech brought tears to everyone’s eyes, and her performance was wonderful.

That night, at age fifty-three, my mother was crowned (为......加冕) “Mrs. Forty-Plus”. She was the first person in our family to ever win such a title.

64. The first two paragraphs mainly show that the author’s mom was __________.

A. experienced      B. painful          C. comfortable        D. fat

65. After the author’s mom completed a forceful eighteen-month diet, she was about __________.

A. 85 kilograms    B. 41 kilograms      C. 130 pounds         D. 90 pounds

66. In order to join in the “Mrs. Forty-Plus” Competition, the author’s mom has to do the following EXCEPT __________.

A. providing a dance performance            B. telling a funny story about herself

C. giving a speech to a large number of people  D. wearing special clothes to show to people

67. The underlined part in Paragraph 6 means that __________.

A. the author’s mom succeeded in modeling and speaking

B. the author’s mom’s performance was very wonderful

C. the author’s mom was not successful in modeling

D. the author’s mom succeeded in making a speech

作为一名服务人员，要掌握必备的安全知识，这样才能提高自己的工资待遇。

耐阴树种