男性，17岁，右侧甲状腺有单发冷结节，最好的疗法是（）
A.镇静药及碘剂
B.抗甲状腺药物
C.放射碘治疗
D.手术治疗
E.多吃海带、紫菜
参考答案：D
列式计算。
（1）1575减去35乘25的积，差是多少？
（2）21除390与30的和，商是多少？
（3）390除以15，再加上874，和是多少？
根据句意，用括号内所给单词的适当形式填空。
小题1:I couldn’t tell others my _______________(excite) feeling in my heart.
小题2:On their way home,they bought _______________(they) something to eat.
小题3:You always answer the questions _____________(correct) in class,so you should listen carefully and make fewer mistakes next time.
小题4:The food your mother cooks is _______________(taste) than that my mother does.
