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【简答题】
土作为路基建筑材料,()最优,()次之,()属不良材料,最容易引起路基病害。
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举一反三
【单选题】关于霍乱,下述错误的是
A.
为烈性传染病
B.
人类是霍乱弧菌的唯一易感者
C.
经消化道传播
D.
病后可获得短暂免疫力
E.
免疫力主要是SIgA的作用
【单选题】我国劳动保险条例对退休待遇的年龄规定为( )
A.
男年满60岁,女职员年满55岁
B.
男年满60岁,女职员年满50岁
C.
男年满55岁,女职员年满55岁
D.
男年满60岁,女职员年满50岁
【单选题】《献血法》规定,公民自愿献血的年龄为
A.
男18至60周岁,女16至60周岁
B.
男16至60周岁,女18至60周岁
C.
男18至60周岁,女18至55周岁
D.
男18至55周岁,女18至55周岁
E.
男18至55周岁,女16至60周岁
【单选题】Photoshop中最常用的有损压缩格式是?
A.
JPEG
B.
PSD
C.
TIFF
D.
PDF
【判断题】越是有知识、有文化,规则意识便越强。
A.
正确
B.
错误
【单选题】第一次产前检查应在
A.
孕4周之前
B.
孕6周之前
C.
孕8周之前
D.
孕12周之前
E.
孕16周之前
【单选题】农村集体经济统计制度规定的男女劳动力的年龄上限分别是( )。
A.
男60岁、女55岁
B.
男60岁、女54岁
C.
男59岁、女55岁
D.
男59岁、女54岁
【简答题】. This company does not ______ (区别)between men and women --- they employ and pay both equally.
【多选题】How do receptor tyrosine kinases (RTKs) activate the PI-3-kinase–Akt signaling pathway?
A.
An extracellular survival signal, such as IGF, activates an RTK, which recruits and activates PI 3-kinase. PI 3-kinase then phosphorylates an inositol phospholipid that is embedded in the cytosolic side of the plasma membrane.
B.
The resulting phosphorylated inositol phospholipid attracts intracellular signaling proteins that have a special domain that recognizes it.
C.
One of these signaling proteins, Akt, is a protein kinase that is activated at the membrane by phosphorylation mediated by two other protein kinases (here called protein kinases 1 and 2); protein kinase 1 is also recruited by the phosphorylated lipid docking sites.
D.
Once activated, Akt is released from the plasma membrane and phosphorylates various downstream proteins on specific serines and threonines.
【单选题】流线型平衡舵在舵叶上均开有由钢管构成的绳孔或在尾端上开有凹槽,其目的是__。
A.
便于系固物件
B.
便于舵拆卸与复装时吊起
C.
便于与舵承舵杆连接
D.
便于试验工作
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