搜题请搜索小程序“爱下问搜题”
问题 解答题

某次射箭比赛，满分是10分，初赛阶段淘汰所有参赛者的50%．已知进入复赛的选手平均分比全体选手的平均分高2分，且进入复赛选手的平均分是8分．则被淘汰选手的平均分是______分．

答案

设共有2n人，则进入复赛的选手为2n×50%=n人、被淘汰的选手也为2n-n=n人；

[（8-2）×2n-n×8]÷n

=4n÷n

=4（分）；

答：被淘汰选手的平均分是4分．

故答案为：4．

判断题

五人制足球每半场有犯规累计，每半场犯规次数超过5次时，第6次犯规则要罚大点球。
查看答案
单项选择题

A new study finds that blacks on death row (1) of killing whites are more likely to be executed than whites who kill minorities. It also concludes that blacks who kill (2) minorities are (3) likely to be executed than blacks who kill whites. For example, there is more than a twofold greater risk that an African-American who killed a white will be executed than a white person who kills a (4) victim. A Hispanic is at least 1.4 (5) more likely to be executed (6) such an offender kills a white.

The researchers of the study believe that there are two (7) explanations.. First, prosecutors often win (8) office if they win well-publicized cases. When a black kills a white, such killings gets more (9) and this idea can be (10) by many famous cases. (11) , the court judges at the state level are often (12) to elections, called retention elections. Retention election or judicial retention within the United States court system, is a periodic process, in which the voter (13) approval or disapproval for the judges presently (14) their position, and a judge can be removed from the position if the (15) of the citizens vote him or her out. Just as the researchers (16) out, death penalty is (17) political.

The findings of the study, in short, show that American justice systems clearly (18) white lives more than those of blacks or Hispanics. The researchers also say their findings (19) serious doubts about (20) that the U.S. criminal justice system is colorblind.

10（）

A.supported

B.approved

C.ratified

D.hold
查看答案