关于肾小管的功能,说法不正确的是
A.分泌
B.滤过
C.重吸收
D.浓缩
E.稀释
参考答案:B
解析:肾小管无滤过功能,只有分泌、重吸收、浓缩、稀释等功能。
.Brandon worked for hours after school________money for her education. [ ]
A. making
B. made
C. to make
D. having made
在波峰焊焊接中为减少挂锡和拉毛等不良影响,印刷版在焊接时通常与波峰()。
A.成一个5°~8°的倾角接触
B.忽上忽下的接触
C.先进再退再前进的方式接触