塑料制品的主要卫生问题是()，具有一定的毒性。
A.单体残留
B.聚合度不够
C.着色剂
D.装有不同食品
参考答案：A
临床表现为意向性震颤、平衡差、口齿不清等症状（）
A.痉挛型脑性瘫痪
B.混合型脑性瘫痪
C.肌张力低下型
D.手足徐动型脑性瘫痪
E.共济失调型脑性瘫痪
Mrs. Smith has a son called John. ______ loves ______ mother very much. [ ]
A. She, her
B. He, his
C. He, her
D. She, his
