下达口令的基本要领是发音部位要正确，掌握好音节，注意音色，突出主音。
参考答案：对
Her eyes __________ on her plate and in a short time, she was busy ________.
A．were fixed, eating
B．fixed, to eat
C．were fixed, to eat
D．fixed, eating
妊娠期使用肿瘤坏死因子-ɑ拮抗剂可出现VACTERL综合征，表现为（）
A.气管-食管瘘及食管闭锁
B.椎骨畸形及肢体畸形
C.新生儿狼疮综合征
D.心畸形
E.肾畸形
