物体三视图的投影规律是显实性、积聚性和收缩性。
参考答案:错
As a student, I’d prefer _______ if I didn’t have to do so much homework.
A.that
B.this
C.it
D.what
安葬完,回家后的哭泣是()。
A.卒哭
B.无时之哭
C.时时之哭
D.反哭