1784年,在巴黎便发布了治安法令,规定未经警察当局批准,禁止气球升空,这一法令被誉为第一部()
参考答案:《航空法》
By law,a user of marijuana shall be subject to().
A.loss of pay during the period of such use
B.reprimand by the US Coast Guard
C.revocation of license or certificate
D.termination of employment
静电电压较低,不会直接置人于死地。