肉眼观察心脏萎缩时可见到()。
A.心脏体积缩小
B.颜色呈深褐色
C.冠状动脉呈蛇形弯曲
D.心脏重量减轻
E.心室壁变薄
参考答案:A, B, C, D, E
选择正确答案填空。
1. Mr. and Mrs. Smith _____________ (have / has) one son and two daughters.
2. My teacher goes to work _____________ (take / on) her bicycle.
3. We go to the _____________ (restaurant / store) to buy clothes.
4. My cousin _____________ (like / likes) to skip with her skipping rope.
液体混合物在加热后,产生的蒸汽和液体一直密切接触,待加热到一定温度时,汽液两相一次分离,这种分离过程称为()
A.一次汽化
B.渐次汽化
C.精馏
D.蒸发