皮皮学，免费搜题
登录
搜题
【单选题】
根据沉降公式,与混悬剂中微粒的沉降速度成正比的因素是A.
微粒半径
B.
微粒半径平方
C.
介质的密度
D.
介质的黏度
E.
微粒的密度
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
【简答题】Cancer has emerged as a major killer in several newly industrialized countries and is striking more people in areas of developing world where it was hardly known before, the World Health Organization(...
【单选题】An element Y has the proton number 18.The next element in the Periodic Table is an element Z.WhiCh statement is correct?
A.
Element Z has one more electron in its outer shell than element Y.
B.
Element Z has one more electron shell than element Y.
C.
Element Z is in the same group of the Periodic Table as element Y.
D.
Element Z is in the same period of the Periodic Table as element Y.
相关题目：