患者陈某，男性，31岁。自觉脘腹痞塞不通，胀满难受而无块状物可及，应诊为（）
A.痞块
B.痞满
C.食积
D.积聚
E.瘿瘤
参考答案：B
Mrs. Obama introduced the Let’s Move _______ yesterday. Its goal is to reduce children obesity(肥胖) today and in the future.
A．challenge
B．battle
C．campaign
D．behavior
把(a+b)当作一个因式，合并7(a+b)－3(a+b)+2(a+b)=（ ）
