自由竞争时期，资本主义国家对外经济联系的主要方式是商品输出。 ( )
参考答案：对
我们吃的水果中，杏、桃属于果实．果实的组成是（ ）
A．果皮与种皮
B．种子与种皮
C．果皮与种子
D．子房与胚珠
The millions of calculations involved, had they been done by hand, () all practical value by the time they were finished.
A. had lost
B. would have lost
C. would lose
D. should have lost
