【简答题】阅读理解 Tokyo, the capital of Japan, is one of the largest cities in the world. It is also one of the world's most modern cities. Twice last century, the city was destroyed and rebuilt. In 1823 a major...
【简答题】公称尺寸≤500 mm时,标准公差分为 个等级;公称尺寸>500~3150 mm时,标准公差分为 个等级。
【单选题】下列有关公差等级的论述中,正确的有( )。
C.
公差等级的高低,影响公差带的大小,决定配合的精度
【判断题】已知 是方程 一个特解,则方程的通解是 .
【简答题】阅读理解。 Tokyo is one of those places that you can love and hate at the same time. In Tokyo there are always too many people in the places where I want to be. Of course there are too many cars. The Japan...
【简答题】Meb Keflezighi has had a very ______1___ athletics career since moving to the United States with his family at age 12. His two biggest highlights are a silver __2____in the marathon at the 2004 Athens...
【简答题】阅读理解填空: (1)如图,已知AB∥CD,∠1=∠2,试说明EP∥FQ. 证明:∵AB∥CD, ∴∠MEB=∠MFD( ) 又∵∠1=∠2, ∴∠MEB-∠1=∠MFD-∠2, 即∠MEP=∠______ ∴EP∥_____.( ) (2)如图,EF∥AD,∠1=∠2,∠BAC=70 o ,求∠AGD. 解:∵EF∥AD, ∴∠2= ( ...