【简答题】(10X4 分 =40 分 ) Directions: Fill in the blanks with the words and expressions from a list of choices given in a word bank following the passage. Each choice should be used only once. (Chris sees Mr....
【单选题】关于细胞水肿,下述哪项是正确的
C.
由于能量供应不足,细胞膜上的钠泵受损,导致细胞内水分增多
【简答题】尺寸φ30±0.15的下极限尺寸是__(填数字即可);上尺寸偏差是__(加正负号);尺寸公差是__。
【单选题】关于细胞水肿,下列哪项是正确的
C.
由于能量供应不足,细胞膜上的钠泵受损,导致细胞内水分增多
【简答题】关于细胞水肿,下述哪项是正确的A. 细胞浆内出现大小不等的圆形空泡B. 线粒体、内质网无明显改变C. 由于能量供应不足,细胞膜上的钠泵受损,导致细胞内水分增多D. 原因消除后,水肿细胞不能恢复正常
【多选题】Consider a relation with schema R(A,B,C,D) and functional dependencies AB → C, D → A. Which of the following are followed from the given FD’s? (This is a multiple choice question)
【多选题】Consider a relation with schema R(A,B,C,D) and functional dependencies AB → C, D → A. Which of the following are superkeys of R? (This is a multiple choice question)