装配断面形状对称的结构，如梁柱等结构，选用______装配法。
A．地样
B．立装
C．仿形复制
D．胎具
参考答案：C
--- What has become of the spaceship?
--- It landed ______.
A．safely but broken
B．safe but has broken
C．safely but was broken
D．safe but broken
下列( )数代表八进制整数。
A．0XA6
B．0144
C．1840
D．-1E3
