Who voiced opposition to the use of pacifiers on infants? The cause of SIDS is______.

admin2009-06-24  26

问题 Who voiced opposition to the use of pacifiers on infants?
The cause of SIDS is______.

选项 A、discovered by Canadian researchers.
B、still unknown.
C、bad sleeping positions.
D、maternal smoking.

答案B

解析
转载请注明原文地址:https://kaotiyun.com/show/I0Hd777K
0

最新回复(0)