国家根据需要下达指令性任务或者国家订货任务的，有关法人、其他组织之间应当依照有关法律、行政法规规定的权利和义务订立合同。（）
参考答案：对
单词拼写
1. He used all his ____ to lift the heavy box.
2. My father ____ at the stranger for a long time as if they
had known each other before.
3. Try to achieve a better ____ between work and play
4. There' s a ____ to how much I' m prepared to spend.
5. This dictionary will be of great ____ to me.
下图是表示气体微粒的示意图，图中“○”和“●”分别表示两种不同元素的原子，那么其中表示混合物的是
A B C D
