【单选题】在制图线型标准中下列线型表示构造局部界限的是()。
【单选题】According to the writer, the Government's policy on physical education
A.
should not promote team games at all
B.
upholds the principles of the Olympic Games
C.
can produce successful Marathon participants
D.
should encourage those qualities pursued by Marathon participants
【单选题】绘制中纵剖面图时,位于中线面和舷侧之间的构件一般在图中用()画法表示,即用细双点划线表示这些构件可见轮廓的投影,用细虚线表示构件这些构件不可见轮廓的投影。
【简答题】电气图样中的粗实线、细实线、虚线、点划线、双点划线各表示什么意思?
【判断题】在外板展开图中细双点划线表示强肋骨、舷侧纵桁、旁内龙骨、基座纵桁等构件的简化线。
【单选题】It is suggested in the fourth paragraph that comprehensive sex education
A.
does not put off sexual activity among the teens.
B.
helps the teens reduce the risk of becoming pregnant by 50%.
C.
helps 50% of the teens avoid the sexual behavior.
D.
helps the teens avoid becoming pregnant more effectively.
【单选题】According to the passage, abstinence education
A.
means abstinence plus-contraception.
B.
has long-term beneficial impacts on young people's sexual behavior.
C.
includes family planning, HIV/AIDS and other sex education.
D.
is an important election's 'moral values' issue of Bush's re-election.
【判断题】基本结构图的舱底图中构件的假想连线用细双点划线表示 。