【单选题】Part I Multiple Choice Questions (1’ x10) Indicate the best answer for each question by circling the correct letter. 1. When using visual aids in a speech, you should __________.
A.
draw graphs and charts on the chalkboard
B.
display visual aids only while discussing them
C.
pass visual aids among the audience at the start of the speech
D.
not worry about maintaining eye contact with the audience
【单选题】In many African and Asian cultures, avoidance of eye contact can indicate respect rather than discomfort or a lack of interest. This example illustrates the importance of ________.
【单选题】服用硫酸亚铁治疗缺铁性贫血时,患者不宜大 量食用脂肪性食物是( )
【判断题】In the United States and in many parts of Europe, direct eye contact is considered as a means to express interest, to indicate trust in the other person and to convey openness.
【单选题】在零件模块中,要得到一个与当前模型不存在几何从属关系的镜像模型,应选择( )
【单选题】物体放在凸透镜前适当位置能在屏上得到一个清晰的像,如果把屏拿开,则( )
【简答题】自由度计算公式为 ,如题图(与第1题图同)所示机构的自由度为 。
【简答题】当前有一个 centos7.2-1511.iso 的镜像文件,使用这个文件配置 yum 源,要求将这个镜像文件挂载在/opt/centos 目录。还存在一个 ftp 源, IP 地址为192.168.100.200,ftp 共享的目录为/opt,/opt 目录中存在一个 iaas 目录(该目录下存在一个 repodata 目录)请问如何配置自己的 local.repo 文件,使得可以使用这两个地方...