【单选题】Task 2 Directions: This task is the same as Task 1. The 5 questions or unfinished statements are numbered 41 through 45. The world is not only hungry it is also thirsty for water. This may seem strang...
A.
the world has not enough fresh water to meet our future needs
B.
people all over the world are thirsty for water now
C.
we are now facing a serious problem of worldwide water shortage
【简答题】在 AutoCAD 中被锁死的层上( ) ( A )不显示本层图形 ( B )不可修改本层图形 ( C )不能增画新的图形 ( D )以上全不能 2 、在 AutoCAD 中,如果 0 层是当前层,则它不可以被( ) ( A )关闭和删除 ( B )锁死和关闭 ( C )冻结和锁死 ( D )删除和冻结