问题 多项选择题

老年性痴呆的临床主要表现()。

A.记忆力障碍

B.认知障碍

C.言语障碍

D.定向障碍

E.人格和行为改变

答案

参考答案:A, B, C, D, E

计算题

(18分)

(1)如图9所示为“验证碰撞中的动量守恒”的实验装置。

①下列说法中不符合本实验要求的是        。 (选填选项前面的字母)

A.入射球比靶球质量大或者小均可,但二者的赢径必须相同

B.在同一组实验的不同碰撞中,每次入射球必须从同一高度由静止释放

C.安装轨道时末端必须水平

D.需要的测量仪器有天平和刻度尺

②实验中记录了轨道末端在记录纸上的竖直投影为O点,经多次释放入射球,在记录纸上找到了两球的平均落点位置MPN,并测得它们到O点的距离分别为。已知入射球的质量为,靶球的量为,如果测得近似等于       ,则可认为成功验证了碰撞中的动量守恒。

(2)用一段长为80cm的金属丝做“测定金属的电阻率”的实验。

①用多用表粗测电阻丝的电阻,结果如图10所示,由此可知电阻丝电阻的测量值约为

       

②用螺旋测微器测量金属丝的直径,结果如图11所示,由此可知金属丝直径的测量结果为

      mm。

③在用电压表和电流表测金属丝的电阻时,提供下列供选择的器材:

A.直流电源(电动势约为4.5V,内阻很小)

B.电压表(量程0~3V,内阻约3k)

C.电压表(量程0~15V,内阻约15k)

D.电流表(量程0~0.6A,内阻约0.125)

E.电流表(量程0~3A,内阻约0.025)

F.滑动变阻器(阻值范围0~15,最大允许电流1A)

G.滑动变阻器(阻值范围0~200,最大允许电流2A)

H.开关、导线。

要求有较高的测量精度,并能测得多组数据,在供选择的器材中,电流表应选择     ,电压表应选择     ,滑动变阻器应选择     。(填字母代号)

④根据上面选择器材,完成图12中实验电路的连接。

阅读理解

Six Hours Free Parking

If you spend $ 100 or more in our stores you will receive six hours of free parking. When you have spent$100 or more , just take this coupon(赠券) and your receipts to the customer service desk on level 4.They will stamp you parking ticket to allow 6 hours of free parking.

Win a$1000 CD Collection

Win your choice of$1000 worth of CDs from JB Music Store.Just buy any two CDs and your name will go into the competition .Select your own prize from our wide variety of rock , pop , jazz , and classical music.Competition ends November 14 .Prize drawn on November 21.Check store for more information

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Buy any meal for at least $6 at Mike’s Café, and receive a free soft drink.We serve the best fast food in the Shopping Centre.Come in and try our delicious meals and our excellent service.You won’t be disappointed! Free soft drink offer ends November 14.

小题1:Susan spent $ 8.5 eating with her friend Lily at Mike’s café. How much more should she spend if she wants to get free drinks for both of them?

A.$3.5.

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D.$12.小题2:We learn from the ads that in Bayfield Shopping Centre        .

A.parking is free

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C.there’re the latest movies

D.tickets are very expensive小题3:Which ad may be the most attractive to parents?

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B.Ten Percent Off.

C.Six Hours Free Parking.

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