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【单选题】
32P、35S、3H是最常用的放射性核素标记物，下列叙述错误的是（）A.
32P的放射性最强，灵敏性高；缺点是半衰期短，分辨率相对较低
B.
3H的优点是射线散射少，分辨率较高；半衰期最长，标记的探针可长时间反复使用，但对环境的潜在危害较大；灵敏性较低
C.
35S的半衰期短，放射性较强，散射作用介于两者之间
D.
35S适用于核酸序列分析和原位杂交等实验
E.
3H特别适合于基因组中单拷贝基因和低丰度基因的检测
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【简答题】Love is a telephone which always keeps silent when you are longing for a call, but rings when you are not ready for it. 小题1: . Love is a telephone which is seldom program-controlled or directly dialed...
【单选题】患者男,28岁。在工作中不慎从高空坠落,头痛、呕吐急诊入院,诊断脑挫裂伤。为预防脑水肿,降低颅内压,应采取的体位是
A.
俯卧位
B.
仰卧位
C.
端坐位
D.
半坐卧位
E.
头高足低位
F.
:E
G.
程度:中
H.
. 患者女,49岁。因肝癌晚期入院。患者出现烦躁不安,躁动,为保证患者安全最重要的护理措施是
I.
用牙垫放于上下臼齿之间
J.
加床挡,用约束带保护患者 K. 室内光线宜暗 L. 护理动作要轻
【简答题】Wow! These onion rings are _________ . Can I have more?
【简答题】French fries ... onion rings ... hamburgers ... cheeseburgers ... tacos ... chips ... They all look so _______ .
【简答题】These onion rings are (美味可口的)____ . Can I have more?
【单选题】As an individual increases his consumption of onion rings, it is likely that:
A.
his marginal utility and total utility both increase.
B.
his marginal utility and total utility both decrease.
C.
his marginal utility increases and his total utility decreases.
D.
his marginal utility decreases and his total utility increases.
【简答题】Onion rings
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