下列有关分子、原子和离子的说法正确的是 A.原子是最小粒子,不可再分 B.原子和

题型:选择题

问题:

下列有关分子、原子和离子的说法正确的是

A.原子是最小粒子,不可再分

B.原子和离子都是带电的粒子

C.分子、原子、离子都可以直接构成物质

D.物质热胀冷缩是由于分子的大小随温度发生改变

考点:分子的定义验证分子特点的实验离子结构示意图构成物质的微粒(分子、原子、离子)
题型:选择题

关于生物学检测法,哪项是正确的()

A.刺激细胞增殖

B.维持细胞生长

C.保持细胞活性

D.抑制细胞生长

E.以上都是

题型:选择题

两辆游戏赛车a、b在两条平行的直车道上行驶。t=0时两车都在同一计时线处,此时比赛开始。它们在四次比赛中的v-t图如图所示。哪些图对应的比赛中,有一辆赛车追上了另一辆[ ]

A.

B.

C.

D.

题型:选择题

上颌前牙颈部的唇舌向倾斜方向为( )。

A.中切牙向唇侧,侧切牙、尖牙向腭侧

B.中切牙、侧切牙向唇侧,尖牙向腭侧

C.中切牙、侧切牙向腭侧,尖牙向唇侧

D.中切牙向腭侧,侧切牙、尖牙向唇侧

E.中切牙、侧切牙和尖牙均向腭侧

题型:选择题

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

题型:选择题

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