【单选题】Question 4. Why did man in the 1960s develop a desire to explore again? ----- Passage 1 ----- There are many great inventions that have changed the way we live in. The first great invention was one th...
A.
Man wanted to move to other stars.
B.
Other countries wanted to catch up with the United States.
【简答题】The _____1_____ is used to slow a car or stop it. The degree of braking a car is controlled by the strength that the driver applies to the _____2_____. Through the _____3_____ in the cylinder, ...