【简答题】灰化土最大的特点是具有灰化淀积层,灰化土的植被以()为主。
【单选题】The regulating element which can give rapid and advanced adjustment is ______. A. B. integral regulating C. D.
A.
proportional regulating
C.
differential regulating
【单选题】The regulating element which can give rapid and advanced adjustment is ____?
A.
Proportional regulating
B.
Differential regulating
【单选题】The regulating element which can give rapid and advanced adjustment is ______.
A.
proportional regulating
C.
differential regulating
【简答题】A.regulates B.regulate C.regulated D.regulating
【单选题】具有 “ 后退向下,强制切土 ” 挖土的特点的土方机械是( )。
【多选题】砂土类土壤具有的特点是()。
C.
黏粒含量高,通气透水性不良,但保水保肥能力好
【单选题】男性,28岁。车祸致脊柱骨折和脊髓损伤,人院时患者双上肢弛缓性瘫痪,双下肢痉挛性瘫痪,躯干和四肢感觉消失。目前行颅骨牵引治疗。牵引期问的护理措施中正确的是( )