【单选题】He went to the park yesterday.(变为否定句)
A.
He not went to the park yesterday.
B.
He didn't go to the park yesterday.
C.
He don't go to the park yesterday.
D.
He doesn't went to the park yesterday.
【单选题】If you go to the park tomorrow morning, _____. [ ]
【判断题】发明专利的保护期限为 20 年,实用新型和外观设计的保护期限为 10 年,均自申请之日 起算。
【单选题】拉压杆的应力公式σ=N/A的主要应用条件是()。
【简答题】Why does he feel proud? Because he has helped to make the park ______.
【简答题】如何理解科学发展观的历史地位和指导意义?
【简答题】如何理解科学发展观的历史地位和指导意义?