【单选题】After The Adventures of Tom Sawyer,Twain gives a literary independence to Tom's buddy Huck in a book entitled ______.
A.
Life on the Mississippi
C.
The Adventures of Huckleberry Finn
D.
A Connecticut Yankee in King Arthur's Court
【单选题】钙通道阻滞剂临床治疗心律失常,是因为其具有什么药理作用?
【简答题】常用钙通道阻滞剂有( )( )( ),临床用途有( )( )( )( )。
【单选题】David Copperfield, Vanity Fair, and Tom Sawyer were written by Dickens, Thackeray and Mark Twain ______.