民事法律行为中所附的条件和期限都具有不确定性。
参考答案：错
No matter how difficult things seem to be, you should say to , “Never mind!” A positive attitude is the key to success.
A. themselves B. ourselves C. yourselves
表皮细胞向外突出呈 * * 状的药材为
A．桑叶B．淡竹叶C．番泻叶D．罗布麻叶E．荷叶
