菌根是真菌和植物根系结合形成的（）。按菌丝在植物根部存在的位置，可将菌根分为（）和（）两类。
参考答案：共生体；内生菌根；外生菌根
Charlie, a CFA candidate, got a copy of a computerized stock selection model designed by a former MBA classmate who is a Wall Street analyst. After spending some time reviewing the program and making a few minor adjustments Charlie showed her new model to her supervisor. Her supervisor said she did a great job and told Charlie to incorporate net new model in her next industry review, which she did. Charlie has:（）
A. violated Standard Ⅲ (E) Preservation of Confidentiality.
B. violated Standard Ⅰ (C) Misrepresentation.
C. violated Standard Ⅱ (A) Material Nonpublic Information.
用winRAR压缩软件对文件进行压缩后的扩展名为（）。
A.只能是RAR
B.RAR和ZIP
C.RAR、ZIP和XLS
D.RAR和CAB
