如果一个长方体和一个正方体的棱长之和相等,那么它们的表面积也一定相等。[ ]
错误
The warning we were given as children ________ an apple a day keeps the doctor away may,in fact,have a scientific explanation.
A.that
B.who
C.where
D.which
室间隔缺损伴亚急性细菌性心内膜炎时,其栓塞的部位常发生在()
A.肺
B.肠系膜
C.脑
D.肾
E.脾