牛膝断面有( )
A．星点B．云锦花纹C．黄白色小点排列成数轮同心环D．罗盘纹E．朱砂点
参考答案：C
解析：[知识点] 根及根茎类中药——牛膝
As early as in 1647 Ohio made a decision that flee, tax-supported schools must be established in every town to have 50 households or more.
A．has
B．having
C．having had
D．had
2011年3月11日日本海啸引发核电站泄漏。回答15－16题。
海啸来临时，伴随的现象有
①海面突然上升和下降 ②海水变浑浊 ③狂风 ④暴雨
A．①②
B．③④
C．②③
D．①④
