哪一个不是COSPAS/SARSAT系统的组成()。
A、MCC
B、SART和雷达
C、EPIRB
D、LUT
参考答案:B
The five rings ____________the close unity and friendly meeting at the Olympics between athletes from five continents.
A.prove
B.represent
C.defeat
D.explain
膜片式汽油泵供油压力过高的原因是()
A、油道有堵塞物
B、泵膜弹簧过软
C、摇臂无自由行程
D、泵麽弹簧过硬行程太长