【单选题】What is the most common problem associated with clutches?
A.
The friction material on the disk wears out.
B.
The friction material on the disk lasts too long.
C.
The friction material on the disk makes a whining noise.
【单选题】What is the most common problem associated with clutches?
A.
The friction material on the disk makes a whining noise.
B.
The friction material on the disk wears out.
C.
The friction material on the disk lasts too long.
【单选题】What is the most alarming consequence of the fast growing population?
A.
Species are dying out at an unnatural high speed.
B.
Living areas for wildlife are disappearing rapidly.
C.
The global weather is becoming warmer.
D.
All kinds of natural resources are draining.
【判断题】人类的体细胞最终都会死亡,只有生殖细胞有延存至下代的机会。
【单选题】听力原文:What is the most important thing to do when fire breaks out in a tunnel? (36)
A.
Detect the smoke quickly.