脑血栓形成的最常见病因是
A．高血压
B．脑动脉粥样硬化
C．各种脑动脉炎
D．血压偏低
E．红细胞增多症
参考答案：B
.It was from only a few supplies that she had bought in the village______the hostess cooked such a nice dinner.
A．where
B．that
C．when
D．which
脂肪酸评价的方法有（）
A、脂肪的溶点
B、脂肪的消化率
C、总脂肪含量
D、脂肪酸的适宜比例
