枣树环剥的适期为（），在天气晴朗时进行。
A、初花期
B、末花期
C、盛花期
参考答案：A
I would like to take this chance to thank my teachers and parents, without _____ I wouldn't be so successful
today. [ ]
A. who
B. which
C. whom
D. them
使用“剪切”和“粘贴”命令在两个文档之间移动文本时，必须同时打开这两个Word文档。 ( )
