[单项选择]

In a refinery, the capacity of oil tank A is 70 per cent of the capacity of oil tank B.
How many more gallons of oil are in tank A than in tank B （）
(1)Tank A is 90 percent full; tank B is 50 percent full.
(2)When full, tank A contains 50,000 gallons of oil.

A. 条件（1）充分，但条件（2）不充分.
B. 条件（2）充分，但条件（1）不充分.
C. 条件（1）和（2）单独都不充分，但条件（1）和条件（2）联合起来充分.
D. 条件（1）充分，条件（2）也充分.
E. 条件（1）和条件（2）单独都不充分，条件（1）和条件（2）联合起来也不充分.

[单项选择]Many years ago there was a huge oil refinery fire. Flames shot hundreds of feet into the air. The sky was thick with, black smoke. The heat was so intense that firefighters had to park their trucks a block away and wait for the heat to die down before they could begin to fight the fire. However, it was about to rage out of control.
Then, all of a sudden, from several block away came a tire truck racing down the street. With its brakes screeching,, it hit the curb in front of the fire. The firefighters jumped out and began to battle the blare. All the firefighters who were parked a block away saw this, and they jumped into their trucks, drove down the block and began to fight the fire, too. As a result of that cooperative effort, they were just barely able to bring the fire under control.
The people who saw this teamwork thought: "My goodness, the man who drove that lead fire track—what an act of bravery!" They decided to, give him a special award w recognize him for his brave
A. come to an end
B. become stronger
C. gradually weaken
D. end one’s life

[填空题]capacity