【单选题】None were fully aware of the unsafe conditions for loading ammunition until the explosion occurred.
【多选题】装配图中零、部件序号及编写规则有()
A.
装配图中所有的零、部件都必须编写序号,一种零、部件只编写一个序号,一般只注写一次。装配图上零、部件的序号应与明细栏中的序号一致。
B.
各指引线不允许相交,当通过有剖面线的区域时,指引线不应与剖面线平行。必要时,指引线可以转折一次。
C.
一组紧固件以及装配关系清楚的零件组,可采用公共指引线,如一组螺栓紧固件。
D.
装配图中各零、部件的序号应按水平或垂直方向排列整齐。优先采用不分视图的按顺时针或逆时针方向全图统一顺次排序。在整个图上无法连续时,可只在每个水平或垂直方向顺次排序。
【多选题】铸造铝合金按基本元素不同,可以分为( )等多个系列
【单选题】The people are fully aware ______ they have before them problems and difficulties of various kinds.
【简答题】Americans must be fully aware that ______ for children and youth are essential to the nation's health and progress.
【单选题】He fully _______ the fact.