【简答题】如图,在菱形ABCD中,∠A=60°,AB=4,O为对角线BD的中点,过O点作OE⊥AB,垂足为E. (1)求∠ABD的度数; (2)求线段BE的长.
【单选题】According to the passage, indictments for crime in Europe in the pre-industrial period______.
A.
remained relatively constant over time
B.
give information about the mental lives of the nonelite
C.
do not exactly reveal the extent of actual crime
D.
have been generally overestimated in their usefulness
【简答题】工业机器人按程序输入方式区分有(__)和(__)两类。
【单选题】According to the passage, Rossetti's verse and that of other Pre-Raphaelites shares which of the following stylistic characteristics?
A.
A melancholy atmosphere
B.
The use of religious figural language
C.
A rejection of the notion of sacrifice
D.
A preference for a Christian solution to aesthetic problems
E.
An anti-orthodox iconoclastic approach
【单选题】针织面料和机织面料的根本区别是:( )。
【简答题】含水率(烘干法)试验须进行二次平行测定,取其算术平均值,允许平均差值应符合规定:含水率40%以下,允许平均差值不大于( )。
【单选题】将发动机凸轮轴支于平台上的V形铁上,用( )检验轴的弯曲程度。