聚甲醛的优良性能共有()项。
A.六
B.八
C.十
D.十二
参考答案:D
____ in my life impressed me so deeply as my first visit to the Palace Museum. [ ]
A. Anything
B. Nothing
C. Everything
D. Something
下列食物中含铁量较多、吸收率最高的为()。
A.黑豆
B.大米
C.奶类
D.肉类
E.黄豆