问题
单项选择题
润滑油带走摩擦热是利用了润滑油的（）作用。
A、冷却
B、冲洗
C、密封
D、润滑
答案
参考答案：A
搜题请搜索小程序“爱下问搜题”
润滑油带走摩擦热是利用了润滑油的（）作用。
A、冷却
B、冲洗
C、密封
D、润滑
参考答案：A
Passage Two
What is the size of Larsen B ice shelf before it disintegrated in the 1900s a. It covered more than 2,000 square kilemeters, and was 300 meters thick. b. It covered more than 3,000 square kilemeters, and was 100 meters thick. c. It covered more than 3,000 square kilemeters, and was 200 meters thick. d. It covered more than 2,000 square kilemeters, and was 100 meters thick,