Classical Athens’s three great tragic playwrights include_______, _____ and ______.
A. Sophocles
B. Aeschylus
C. Euripides
D. Shakepeare
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Drama is made up of six elments, namely ________.
A. plot and character
B. thought
C. language
D. spectacle or visual effects
E. choral odes
For analysis plot is divided into four parts: ______, ______, ______,and ______.
A. exposition
B. complication
C. reversal
D. resolution
具有2017个结点的二叉树,其深度至少为( )。
A. 9
B. 10
C. 11
D. 12
若一棵二叉树有10个度为2的结点,5个度为1的结点,则度为0的结点个数是()。
A. 9
B. 11
C. 15
D. 不确定