问题
单项选择题
Amniocentesis can reveal whether a fetus is suffering from any of a variety of chromosomal defect.
答案
参考答案：defect→defects
搜题请搜索小程序“爱下问搜题”
Amniocentesis can reveal whether a fetus is suffering from any of a variety of chromosomal defect.
参考答案：defect→defects