问题
多项选择题
双子叶植物根木栓形成层的来源（）。
A.中柱鞘
B.初生韧皮部
C.次生韧皮部
D.木质部
答案
参考答案：A, B, C
搜题请搜索小程序“爱下问搜题”
双子叶植物根木栓形成层的来源（）。
A.中柱鞘
B.初生韧皮部
C.次生韧皮部
D.木质部
参考答案：A, B, C
| 用方框中所给单词填空 | |
2. _________ at the clock, please. What time is it? 3. Dave has a bat. He plays ________ every day. 4. Mr Wang has a new TV. He ________ TV every night. 5. She has a tennis racket and a tennis _________. 6. I can play _________. It's very interesting. |