一个人向另一个人签发,保证见票即付或者在可以确定的未来时间,由自己无条件支付给持票人一定金额的书面承诺是关于( )的描述。
A.汇票
B.本票
C.支票
D.电汇
参考答案:B
关于平抛运动和圆周运动,下列说法正确的是( )
A.平抛运动是匀变速曲线运动
B.匀速圆周运动是速度不变的运动
C.圆周运动是匀变速曲线运动
D.平抛运动的物体落地时的速度一定是竖直向下的
________ that all mountain roads were closed.
A.So became the dangerous weather
B.So dangerous did the weather become
C.So dangerous became the weather
D.Dangerous the weather became so