尿素是蛋白质的变性试剂，高浓度的尿素可以拆开蛋白质分子中的二硫键。( )
参考答案：错
.The 114 colorful clay Warriors ____ at No. 1 pit, ______ in height from 1.8m to 2m, have black hair, green, white or pink faces, and black or brown eyes.
A．unearthed; ranging
B．unearthing; ranging
C．unearthed; ranged
D．are unearthed; are ranging
圆锥管螺纹的牙型角有55°与60°的。( )
