皮皮学，免费搜题
登录
搜题
【判断题】
设 是相互独立的随机变量, 且服从参数 的泊松分布,记 ,则 。( )A.
正确
B.
错误
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】下列关于黄河说法错误的是()。
A.
黄河是中华民族文明的主要发祥地之一
B.
黄河发源于巴颜喀拉山脉,呈“几”字形
C.
黄河全长5464 km,为我国第一大河。
D.
黄河流经青海、四川、甘肃、宁夏、内蒙古、山西、陕西、河 南、山东共9个省区,最终注入渤海。
【单选题】The future will belong to those who ______.
A.
possess and know how to make use of information
B.
give full play to their brain potential
C.
involve themselves in service industries
D.
east their minds ahead instead of looking back
【单选题】下面关于毛地黄说法错误的是 :
A.
毛地黄全株有毒，没有药用价值
B.
毛地黄较耐寒，较耐干旱，忌炎热
C.
毛地黄常用种子繁殖，一般均为秋播
D.
毛地黄是优良的花境竖线条材料，也可在花坛、岩石园中应用
【简答题】The people below are going to make a trip. After the description of these people, there is information about six tours A-F. Decide which tours would be most suitable for the people mentioned in descri...
【单选题】关于地黄说法错误的是
A.
玄参科植物地黄的新鲜或干燥块根
B.
主产于河南
C.
生地黄表面灰棕色或灰黑色，表面皱缩不平，具不规则的横曲纹
D.
气微香，味微甜
E.
表面灰黄色或灰褐色，有不规则的纵沟、横向皮孔等。
【单选题】Which of the following best describes the function of the last paragraph in relation to the passage as a whole?
A.
It summarizes the benefits that may accrue from a perfected system of pathological taxonomy.
B.
It provides additional reasons why pathological taxonomy is a difficult endeavor.
C.
It argues for a synthesis of two methods of pathological taxonomy already in use.
D.
It continues to highlight the differences between two methods of taxonomical pathological taxonomy.
E.
It provides information that points to the eventual abandonment of a particular system of pathological taxonomy.
相关题目：