was school trip last weekend?
— the twins computer games yesterday?
—No, .
— you cows last week?
—Yes, .
— chickens on the farm?
—Yes, .
family last Sunday?
①在实验中,小乐需用弹簧测力计拉着木块在水平面上做匀速直线运动;根据可得,木块受到的滑动摩擦力的大小等于弹簧测力计对木块拉力的大小。
②若两次实验,弹簧测力计的示数F1<F2 , 由此可初步得到的实验结论是:。
①在实验中,(选填“需要”或“不需要”)匀速拉动硬纸板。
②多次实验后,小乐得到F拉和F压的关系图线如图丙所示,由此推知;当F压=12N时,铁块受到的滑动摩擦力为N。
温州市某木材加工厂2004~2007年的年产值统计图如图所示,则年产值在25万元以上的年份是( ).
①用数学关系式可以表示为 ▲ ;
A. B.
C.
②请证明你选择的数学关系式是正确的.
①用数学关系式可以表示为 ▲ ;
A. B.
C.
②请证明你选择的数学关系式是正确的.(友情提示: ,
)
Dear Sue,
I'm happy to be your friend. Today I want to tell you something about my city.
I live in New Delhi. It's a big city in India. And it's really beautiful and clean. There are lots of trees and flowers on the streets. We can go to places by bus and train. We can also ride bikes. There are many interesting places to visit, like the Red Fort, India Gate, and Akshardham Temple. The Taj Mahal is not far from New Delhi and it is one of the most beautiful tombs (最漂亮的坟墓) in the world.
My school is near Connaught Place. Connaught Place is very famous in our country and around the world. Many visitors from different countries come to Connaught Place every day. I often talk to these visitors. It's very interesting to talk with people from different countries.
New Delhi is a very nice place but the climate(气候) is not very good. We have very hot weather for 8 months and we only get 4 months to enjoy winter. I don't like hot weather. It makes me want to sleep.
How about your city? Write and tell me something about it.
Claire
City |
Weather |
Temperature |
|
Cloudy and |
5℃-7℃ |
Guangzhou |
Rainy |
℃-20℃ |
Harbin |
|
-18℃-0℃ |
Kunming |
Sunny and |
10℃-16℃ |
青春期是人生中生长发育最快的第二个生长期,更是智力发展的重要阶段。合理的营养会促进中学生的大脑功能和智力发育。大量的实验表明,通过调整饮食可迅速改善大脑的工作状态,尤其是缓解大脑的疲劳,结合下图进行分析,回答以下问题:
①朋友的影响会使人彻底改变自己的命运
②我们的言谈举止、兴趣爱好甚至性格都或多或少地受到朋友的影响
③朋友对一个人的影响很大
④能结交到亲密的朋友是一种幸福
试管编号 | ① | ② | ③ |
馒头碎屑或块 | 适量的碎屑 | 适量的碎屑 | X |
唾液有无 | 2毫升的唾液 | 2毫升清水 | 2毫升唾液 |
是否搅拌 | 搅拌 | 搅拌 | 搅拌 |
温度 | 37℃ | ||
加入碘液 | 2滴 |
根据如表完成下列问题: