植物的生长能随着光的方向弯曲的现象称为（）。 A.向光性 B.向地性 C.向上性 D
题型：单项选择题
问题：
植物的生长能随着光的方向弯曲的现象称为（）。
A.向光性
B.向地性
C.向上性
D.向下性
题型：单项选择题
As a boy ,Mark Twain caused much trouble for his parents . He used to play practical jokes on all his friends and neighbors .The nature of his jokes often led to violence. He hated to go to school, and he constantly ran away from home. He always went in the direction of the nearby Mississippi .He liked to sit on the bank of the river for hours at a time and just gaze at the mysterious island and the passing boats. He learned many things about the river during those days. He learned all about its history and unusual people who rode up and down it . He never forgot those scenes and those people .He later made them part of the history of America in the books Tom Sawyer and Huckleberry Finn.
Mark Twain received his genius （天才）from his mother . Obviously he didn’t get it from his father . He once stated that he had never seen a smile on his father’s face .On the other hand, his mother had the rare ability to say humorous things. The same ability made Mark Twain an extremely humorous public speaker.
小题1:Because of the nature of his jokes when he was a child , Mark Twain would
A．ran away from school
B．cause his parents to quarrel with others
C．get into trouble with his friends and neighbors
D．like to sit on the bank of the Mississippi
River小题2:It can be learned from the text that
A．Mark Twain’s father was a cruel man
B．Mark Twain never attended school on time
C．Mark Twain often went boating in the nearby river
D．Mark Twain’s mother was something of a humorist小题3:In his books Tom Sawyer and Huckleberry Finn Mark Twain wrote much about
A．the Mississippi and the people riding on it
B．his friends and neighbors
C．his school life
D．his parents小题4:It is implied that what affected Mark Twain’s character mostly was
A．his practical jokes
B．his father’s seriousness
C．the history of the Mississippi
D．his mother’s genius for humor