问题 实验题

向家坝水电站是金沙江下游梯级发电站开发中的最末一个电站,在大坝修建中要用到大量碎石子.小华随意选取其中一块石子,准备在实验室测定它的密度.

(1)他先将天平放在水平桌面上,移动游码至标尺左端    处,发现指针静止在分度盘中央的右侧,则应将平衡螺母向    调节,直至天平平衡.

(2)用调好的天平测石子的质量,当盘中所加砝码和游码位置如图(甲)所示时,天平平衡,则此石子的质量为    g.在量筒内装有一定量的水,该石子放入前、后的情况如图(乙)所示,则石子的体积是    cm3,此石子的密度是    kg/m3

答案

(1)零刻度线 左 (2)38.4    15      

(1)天平平衡的调节,要放置在水平面上,游码移动到零刻度线处,若不平衡调节平衡螺母。指针右偏说明右边重,螺母向左调。(2)天平的读数分为2部分,砝码20+10=5=35g,游码以左侧边缘对齐的刻度为准,3.4g 所以总共是35+3.4=38.4g。对照乙图,石子放入前体积为30ml,放入后为45ml,从而得出石子体积为45-30=15ml.也就是15 cm3

的调根据密度计算公式

阅读理解

     Nikos Kaklamanakis will go down as one of the best windsurfing athletes the world has ever known.

Nikos was the winner of the Gold Medal in the 1996 Olympic Games in Atlanta. Another three athletes

also won gold medals for Greece. This marked an important stage for Greece, since it was the first time in

the country's history to bring home four gold medals in a single Olympic Games.

     According to Nikos Kaklamanakis' official website, he says his "entire life is a journey. Set a goal, and

give my heart to achieve it. "He further notes that he is not afraid of challenges, nor does he ever want

challenges to end. Particularly impressive about Nikos is that throughout his life, he has spent more time

at sea than on land.

     Called by many journalists as the "gios tou anemou", which means "the son of wind," Nikos was

honored as the silver medalist at the 2004 Summer Olympic Games in Athens. He also won the gold

medals in the Mistral World Championships three times, in 1996, 2000 and 2001 separately. Nikos

received praise from the Greek Sports Press Association.

     At the 1996 Olympic Games in Atlanta, Kaklamanakis served as the flagbearer for Greece at the

closing ceremony. Lastly, serving as a torchbearer, Nikos was the first athlete to enter the Olympic

stadium in the opening ceremony of the 2000 Olympic Games. Nikos received the greatest honor of

lighting the Olympic torch in the opening ceremony of the 2004 Summer Olympic Games that were

held in Athens, Greece.

     At 42, Kaklamanakis shows no signs of slowing down. On August 31, 2009 Nikos won another

world championship gold medal. This shows greatly that Nikos is like "fine wine". He only gets better

with age! Generally Nikos is a man with strength and willpower. He is living proof that nothing is

impossible as long as you stay focused and give your heart and soul to achieve your goal.

1. What can we learn about Nikos Kaklamanakis from the passage?

A. He is a swimming athlete and practices hard.

B. He is the best windsurfing athlete in the world.

C. He has won three medals altogether till now.

D. He brought great honor to his motherland in 1996.

2. What makes people admire Nikos is that ________.

A. he practices very hard

B. he sets a very high goal

C. he fears no challenges

D. he is "the son of wind"

3. Which gives Nikos the highest honor according to the author?

A. His serving as a torchbearer.

B. His serving as the flagbearer.

C. His lighting the Olympic torch.

D. His being praised by radio.

4. It can be inferred that ________.

A. his courage disappears with age

B. the older he is,the better he performs

C. he has fallen behind other athletes now

D. he is in poor health at present

5. What is the secret of Nikos Kaklamanakis' success?

A. Working hard to realize the goal he sets.

B. The support from his friends and family.

C. The love for windsurfing.

D. Paying attention to his goal all the time.

6. 用30词左右概括文章大意

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单项选择题 B1型题