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【单选题】
8250串行通信芯片中用于指定串行异步通信的数据格式的寄存器是______。A.
发送保持寄存器
B.
通信线状态寄存器
C.
接收缓冲寄存器
D.
通信线控制寄存器
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知识点：
皮皮学刷刷变学霸
举一反三
【单选题】当一个Web控件上发生的事件需要立即得到响应时,应该将它的_属性设为true。
A.
PostBack
B.
IsPostBack
C.
AutoPostBack
D.
以上都不对
【单选题】施工承包方式的典型模式为（ ）。
A.
“设计+施工”
B.
“设计+招标+施工” $amp>amp>amp>amp>amp$gt
C.
“设计采购建造”
D.
“工厂设备与设计+施工”
【多选题】How do enzyme-coupled receptors work?
A.
Enzyme-coupled receptors are transmembrane proteins that display their ligand-binding domains on the outer surface of the plasma membrane. The cytoplasmic domain of the receptor either acts as an enzyme itself or forms a complex with another protein that acts as an enzyme.
B.
Enzyme-coupled receptors were discovered through their role in responses to extracellular signal proteins that regulate the growth, proliferation, differentiation, and survival of cells in animal tissues.
C.
Most of these signal proteins function as local mediators and can act at very low concentrations (about 10ˉ 9 to 10ˉ 11 M). Responses to them are typically slow (on the order of hours), and their effects may require many intracellular transduction steps that usually lead to a change in gene expression.
D.
The largest class of enzyme-coupled receptors consists of receptors with a cytoplasmic domain that functions as a tyrosine kinase, which phosphorylates particular tyrosines on specific intracellular signaling proteins. These receptors, called receptor tyrosine kinases (RTKs).
【单选题】关于电子胎儿监测错误的是
A.
胎心率基线包括每分钟心搏次数及FHR变异两种基本变化
B.
FHR基线示胎儿储备能力
C.
无应激试验是宫缩时的FHR变化
D.
晚期减速是胎儿缺氧的表现
E.
OCT阳性提示胎儿窘迫
【简答题】当一个 Web 控件上发生的事件需要立即得到响时,应该将它的 AutoPostBack属性设置为()。
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