池杉当年生的小枝_________色,细长,常略向下弯垂,2年生小枝褐红色。
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水杉和落羽杉的主要区别是水杉的小枝是_________;而落羽杉的小枝是互生。
马尾松、黑松的叶通常是_________针1束,但黑松的叶粗短而硬。
红豆杉与南方红豆杉非常相似,主要区别是红豆杉的叶缘_________。
Please turn to page 95. Choose the best answer to complete each of the following sentences according to the information contained in the listening passage.1)This talk is mainly about ________.
A. why teenagers refuse to listen to their parents
B. what the larger problems in the parent-teenager relationship are
C. what needs to be done to improve the parent-teenager relationship
D. what causes the communication problem between teenagers and their parents