管理幅度是指所直接管辖人数的多少，一般而言，______可以使管理幅度增加。A．下属

若方程3x+2a=9与3x+2=11的解相同，那么a=______．

对那些为广大用户开发的软件而进行的β测试是指在（）的情况下所进行的测试。

A．开发环境下，开发人员可不在场

B．开发环境下，开发人员应在场

C．用户的实际使用环境下，开发人员可不在场

D．用户的实际使用环境下，开发人员应在场

简述道岔区段分支并联引接线要求。

探放水孔口管壁厚不小于（）mm。

A.5

B.6

C.7

D.8

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.

1（）

A.convicted

B.charged

C.believed

D.sentenced