急性心力衰竭的发病机制,临床上有多个因素,其中不正确的是()
A.心肌收缩力减弱
B.心脏负荷增加
C.心室顺应性增加
D.心脏各部分的功能协调障碍
E.心律和心率的影响
参考答案:C
Documentation of a software package is normally produced for two purposes.One is to explain the(1)of the software and describe how to use them.This is known as (2)because it is designed to be read by the user of the software.The other purpose of documentation is to describe the software's intemal composition so that thesystem can be maintained later in its life cycle.Documentation of this type is known as(3)
空白(2)为()
A.system documentation
B.user documentation
C.vender documentation
D.product documentation
多根三角皮带传动时,如果其中某根因磨损失效,应立即()。
A.将其更换新三角带
B.用新旧相等的三角带更换
C.所有三角带都更换
D.修补旧三角带进行二次利用