题目内容
19、A NASA experimental jet, the X—43A, flied at a world—record speed—11,260 kilometers an hour on November 17. Its speed is as sound.
A.as ten times fast B.ten times so fast
C.ten times as fast D.so fast ten times
试题答案
19、C
A NASA experimental jet, the X—43A, flied at a world—record speed—11,260 kilometers an hour on November 17. Its speed is as sound.