悬铃木的叶子在秋季落叶前变黄，就是因为失去了叶绿素，只剩叶黄素和胡萝卜素 的缘故。
参考答案：对
Which of the following statements is NOT true of comedy according to the passage a. Present comedy is funnier than the past. b. People’s conception on comedy remains unchanged for decades. c. Contemporary comedy tends to be superficial. d. Old comedy was considered thought-provoking.
不大便五、六日，舌上燥而渴，日晡所小有潮热，从心下至少腹硬满而痛不可近者（）
A.大承气汤主之
B.大柴胡汤主之
C.调胃承气汤主之
D.小承气汤主之
E.大陷胸汤主之
