江西省高速集团的主要特点和成就可以概括为()。
A.江西“航母”
B.江西龙头
C.江西速度
D.江西窗口
参考答案:A, C, D
With the help of the foreign experts, they produced ___ washing machines in 2003 as the year before. [ ]
A. as twice many
B. as twice as many
C. as many as twice
D. twice as many
某人在竖直墙壁上悬挂一镖靶,他站在离墙壁一定距离的某处,先后将两只飞镖A、B由同一位置水平掷出,两只飞镖插在靶上的状态如图所示,若不计空气阻力,下列说法正确的是( )
A.B镖的运动时间比A镖的运动时间短
B.B镖掷出时的初速度比A镖掷出时的初速度大
C.A镖掷出时的初速度比B镖掷出时的初速度大
D.A镖的质量一定比B镖的质量小