阅读理解。
There are a lot of things that happen to me in China but would certainly never happen in the US. One of
those things is being called"strong".
The first time was last December. I was walking across the high school campus in Guangzhou where I
taught when a student in a gray scarf waved hello. I smiled and waved back, but then she stopped and called
my name."You're so strong!" She smiled and pointed at what appeared to be my right arm.
I looked down at my arms. Let's get one thing clear: I'm a very skinny guy. Once, while rehearsing for a
high school talent show, I was told by the teacher in charge that I couldn't participate in the men's shirtless
dance routine because my visible rib cage (胸腔) would frighten the audience.
"I'm so what?""You're so strong!" she repeated."Um, thanks!" I didn't know what else to say, so we both
waved goodbye.
The next morning I stepped into my oral English classroom only to be greeted instantly by a unanimous
(异口同声的) "Waaa!" of shock and admiration."What?" I asked."You're so strong!" shouted a boy from the
back of the class.
"Okay, will someone tell me what that means?" I was curious as to the real reason for such praise. So I
turned to the monitor, gesturing for him to speak.
"We just mean, you look very strong today," he offered earnestly.
"What?! You mean like this?" I curled (卷起) my arm like a body-builder.
"No! But it's so cold, and you're only wearing a short-sleeved shirt."
Oh, I got it. My"strength" had less to do with my muscle and more to do with my apparent ignorance of
the cold weather.
1. From the passage we can learn that the author is _______.
A. an American teacher
B. an American student
C. a Chinese teacher
D. a Chinese student
2. The author used the example of being refused to join in the dance routine to show that ______.
A. many people worry about his bad health
B. actually he isn't physically strong at all
C. he is as strong as a body builder
D. being called "strong" often happens to him
3. The underlined word "she" in the 4th paragraph refers to ______.
A. a stranger he met on the way to work
B. the teacher in charge of the dance routine
C. the girl who joined in the rehearsing
D. the girl he met on the campus
4. Which of the following is the best title for the passage?
A. Am I Strong or Do I Need a Sweater
B. The Chinese Culture or the Western Culture
C. How I Can Get Stronger in Winter
D. How We Can Tell Two Different Cultures Apart
自N点滑向物块A，已知MN=L，AB间每次碰撞后即紧靠在一起但不粘连，每次AB与档板碰撞后均原速率弹回，求：
；
虫丸治疗虚劳的作用，侧重于（）