下列计算正确的为[ ]
A.a2+b2=a2b2
B.a2b-ab2=0
C.a2+a2=a4
D.3a3-2a3=a3
答案：D
孤独症的治疗不包括（）
A.教育实施
B.家庭支持
C.行为治疗以及语音、语言治疗
D.氯硝西泮
E.盐酸甲硫哒嗪
Questions 1-4
What did the man originally want to buy when he went shopping？（）
A．A V-necked pullover with short sleeves.
B．A high-necked pullover with long sleeves.
C．A white pullover with a pattern.
D．A blue pullover with a high neck.
