下图(a)是用DIS测定小车起动时加速度的实验装置. (1)信号发射部分和信号接

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问题:

下图(a)是用DIS测定小车起动时加速度的实验装置.

(1)信号发射部分和信号接收部分组成______传感器,A应是信号______部分.

(2)实验室里使用这组传感器直接测量的物理量是______.

(3)图(b)是根据实验数据得到的速度-时间图象,据图象中数据可求出小车加速度的大小为a=______m/s2

考点:实验:探究小车速度随时间变化的规律
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A recent study shows that gossip(流言蜚语)is more powerful than truth.It suggests people believe what they hear through the grapevine(小道消息)__36__they have evidence to the contrary.

Researchers, __37__students using a computer game, also found gossip played an important role when people __38__ decisions."We show that gossip has a strong __39__, even when people have __40__ to the original information as well as gossip about the same information.Thus, it is __41__ that gossip has a strong controlling potential," said Ralf Sommerfeld, who led the study.

In the study, the researchers __42__ the students money and allowed them to give it to others in a series of rounds.The students also wrote __43__ about how others played the game that everyone could review.Students tended to give __44__ money to people described as “scrooges (吝啬鬼)” and more to those described as “__45__ players”.“People only believed the gossip, not the past decisions," Sommerfeld said in a telephone interview.

The researchers then took the game a step_46_and showed the students the actual decisions people had made.But they also supplied false gossip that contradicted that __47_.In these cases, the students_48_ their decisions to award money on the gossip, __49__ the hard evidence.

“If you know what the people did, you should care, but they still __50__ what others said,” Sommerfeld said.Researchers have __51__ used similar games to study how people cooperate and the __52__ of gossip in groups.Scientists define gossip __53__ social information spread about a person who is not __54__.In evolutionary terms, gossip can be an important tool for people to __55__ information about others' reputations or find the way through social networks at work and in their everyday lives.

36.A.in case     B.for fear that     C.as if  D.even if    

37.A.testing     B.checking C.examining       D.experimenting

38.A.draw       B.make       C.reach       D.conclude

39.A.impression      B.difference       C.influence D.function

40.A.access      B.entrance   C.charge     D.communication

41.A.curious    B.serious     C.obvious    D.worth

42.A.impressed      B.asked       C.showed    D.gave

43.A.articles    B.notes       C.dairies     D.letters

44.A.less B.more       C.fewer       D.much

45.A.general    B.mean       C.generous D.outgoing

46.A.away       B.forward   C.ahead       D.further

47.A.existence B.evidence C.confidence      D.dependence

48.A.based       B.put   C.focused    D.passed

49.A.more than       B.less than   C.rather than      D.other than

50.A.referred to      B.listened to       C.turned to D.stuck to

51.A.soon        B.presently C.far    D.long

52.A.strength   B.energy     C.effect     D.force

53.A.as     B.for   C.to     D.by

54.A.absent      B.present     C.gone  D.missing

55.A.achieve    B.earn C.acquire    D.win

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婚宴和寿宴的座次安排,应遵循中国传统的礼仪和风俗习惯,其一般原则是“()、()、()”。

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下列各项中,银行卡持卡人不可以使用单位卡的情形包括( )。

A.购买价值8万元的电脑

B.存入销货收入的款项

C.支付15万元劳务费用

D.支取现金

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合格境外机构投资者可以委托两家或两家以上境内证券公司办理相关证券交易业务。( )

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脂质体的制备方法包括()

A.饱和水溶液法

B.薄膜分散法

C.复凝聚法

D.研磨法

E.单凝聚法

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