飞机机身受到对称载荷作用时，承受大部分剪力的构件是：（）.
A.机身上、下部分蒙皮
B.机身左、右两侧蒙皮
C.机身纵梁
D.机身长桁
参考答案：B
用下面所给单词填空,注意形式。
latest， seem，check，score，weekly
1.The ___________ of the football game was 2 to 1.
2.Could you tell me who got the ____________ news.
3.It is a _______ TV programme.
4.You must go to the hospital to __________ your body.
5.It ___________ that she is very happy to see me.
什么是再生橡胶改性沥青防水卷材
