动量、机械能以及角动量都守恒

动量、机械能守恒，但角动量是否守恒不能断定

动量守恒、但机械能和角动量是否守恒不能断定

动量和角动量守恒，但机械能是否守恒不能断定

正确

错误

动量、机械能以及角动量都守恒

动量、机械能守恒，但角动量是否守恒不能断定

动量守恒、但机械能和角动量是否守恒不能断定

动量和角动量守恒、但机械能是否守恒不能断定

足背动脉

胫后动脉

腘动脉

股动脉

足背动脉

胫后动脉

腘动脉

股动脉

introduce

anxiety

acquisition

acquaint

indicated

saddled

reinforce

resent

sensible

expressed K. equivalent L. transition M. shifting N. regretting O. acceptable There is a special life stage that our generation goes through. It is the 1)_____ period, during which we move from teenage to adolescence. We learn who we are and what we stand for and what inspires us. Also, in this period we are 2)_____ with a lot of pressure from our parents who want us to make something out of ourselves. My parents have already expressed feelings of 3)_____ over my future with academics and life. When I expressed to them recently that I would not mind graduating in five years instead of four in order to study abroad to 4)_____ myself with the world, they seemed so shocked. That idea sounded foreign and to them was 5)_____ to lack of ambition. Apart from that, my mother has 6)_____ to me that she is worried that I am not searching for a boyfriend. I 7)______ this stupid idea of marrying out of college since it does not suit me one bit. Women today can get what they want out of life without a man, even children, as it becomes more 8)_____ for women to adopt children. I personally want to stay in school as long as I can to 9)______ my academic work, possibly complete a law degree and start a career, and then after, and only after, begin to think about 10)_____ to marriage. If my math is correct, that means I will be more or less “ready” for marriage at the age of 29 or 30, the age when my mother had me.

tempting

promising

process

local

comment

proceed

components

charm

appealed

allowing K. display L. weird M. magic N. arrange O. commence Traditional dating is a self-paced, general meeting of two people. The two usually 1)_______ with spending extra time together, getting to know one another and seeing how 2)______ they could be to each other. A good example is a man meeting a woman and sensing her 3)______. He then extends a formal invitation for a date. With traditional dating, you get to go at a steady pace, 4)______ yourself and your date to get to know each other through extensive contact. There are many 5)______ that can be expected from traditional dates. Men, who are supposed to 6)______ these traditional values, will open the door for the woman, stand up when she leaves the table, pay for everything, and 7)______ to the next move. In the 1950s, a man would usually ask a woman out several days ahead for a specific date and time. If she accepted, they would 8)______ for a time to pick her up. He would then take her to a dinner and a movie. Today the rules of traditional dating are less clear. Twenty years ago, if a young lady asked a young man out on a date, it was thought to be 9)______. Now, women are being encouraged to take the initiative and ask men out. A date may consist of a brief meeting at a cafe or a trip to the 10)______ art museum. Men often pay on the first date, but the woman may offer to go Dutch. The traditional dating style has been found much less common now.

动量、机械能以及对一轴的角动量都守恒

动量、机械能守恒,但角动量守恒与否不能确定

动量守恒,但机械能和角动量守恒与否不能确定

动量和角动量守恒,但机械能守恒与否不能确定

正确

错误