Bats (are able) to (guide them) by producing sound waves (too high) for us (to hear).

admin2012-03-26  18

问题 Bats (are able) to (guide them) by producing sound waves (too high) for us (to hear).

选项 A、are able
B、guide them
C、too high
D、to hear

答案B

解析
转载请注明原文地址:https://kaotiyun.com/show/gaJO777K
0

随机试题
最新回复(0)