单选题Do you know a spaceship flies at about nineteen kilometers ______ second?AtheBaC/Dan
单选题
Do you know a spaceship flies at about nineteen kilometers ______ second?
A
the
B
a
C
/
D
an
参考解析
解析：
考查冠词。句意：你知道宇宙飞船的飞行速度大约是每秒19千米吗？这里表示飞行速度，因为second是以辅音音素开头的单词，所以前面加不定冠词a。
考查冠词。句意：你知道宇宙飞船的飞行速度大约是每秒19千米吗？这里表示飞行速度，因为second是以辅音音素开头的单词，所以前面加不定冠词a。
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