一般LNG加气枪的公称压力是（）。A、1.2Mpa B、1.8Mpa C、3.25Mpa

根据短文内容，用方框中所给词的适当形式填空，并用其正确形式填空，使短文完整，正确。（每个词只能用一次；共10分，每小题一分）

Light travels at a speed(速度) which is about a million times faster than that of sound .小题1:

    One second, light travels about 300000 kilometers, but sound travels only 340 小题2:     .  You can get some idea of this difference by 小题3:________ the start of a running match. If you stand far away from the starter(发令员), you can see smoke小题4:________ from his gun before the sound reaches your ears.

The 小题5:     speed of light produces some strange facts. The 小题6:    star is so far away that light which you can see from it tonight started to travel to you  four years 小题7:________ at a speed of nearly two million kilometers every minute. The light from some of tonight's started on小题8: ________ journey towards you even before you were born.

So, if we want to be honest(诚实), we can not say , " The stars are shining 小题9: ________tonight."  We have to say, " The stars look nice. They were 小题10:_______ four years ago but their light has just reached our earth. "

报检员申请检验．检疫．鉴定工作时，应按规定缴纳检验检疫费。（）

女性，60岁，近3年来劳累时心慌气短，有时夜间憋醒，咳嗽。1年来腹胀、尿少、浮肿，稍事活动即心慌，一直服用速尿与地高辛治疗。近1周来咳嗽，浮肿加重，纳差、心悸，体检：心脏扩大，心尖区间舒张期隆隆样杂音与3/6级收缩期杂音，双肺底少许湿性啰音，颈静脉怒张，肝肋下3cm，双下肢浮肿，心电图示：室性期前收缩二联律。根据以上临床资料回答下列问题：

该患者心脏病的诊断可能是（）

A.先天性心脏病

B.风湿性心瓣膜病

C.扩张性心肌病

D.肺原性心脏病

E.冠心病

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机械制图中尺寸注法的基本规则是什么？