太阳所含氢是够燃烧100亿年,到氢燃烧末期后,太阳就会消失。
参考答案:错
心动不如行动,我们要将爱心化作切实的行动,做行动的巨人。[ ]
Which spoken emergency signal would you use to call a boat to come assist a man overboard?()
A.Distress signal
B.Urgency signal
C.Safety signal
D.None of the above