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【多选题】
求解非线性方程组sin(x(1))+x(2)^2+log(x(3))-7=0;3*x(1)+2^x(2)-x(3)^3+1=0;x(1)+x(2)+x(3)-1=4.
A.
1.5288
B.
2.2844
C.
2.1868
D.
0.5991
E.
2.3959
F.
2.005
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举一反三
【单选题】氨苄西林的口服生物利用度差,克服此缺点的主要方法是
A.
侧链氨基酯化
B.
芳环引入疏水性基团
C.
2-位羧基酯化
D.
芳环引入亲脂性基团
【单选题】以下氨基酸的主要作用特点,错误的是
A.
支链氨基酸可减少肌蛋白分解并促使其合成,增加用量对肝损害的修复有利
B.
鸟氨酸α酮戊二酸盐对抗分解代谢,减少肌肉释放氨基酸,提高前白蛋白及视黄醇结合蛋白水平
C.
精氨酸是肠黏膜细胞、淋巴细胞的主要能源,有效预防肠源性感染
D.
精氨酸可刺激胰岛素、生长激素分泌,增加创面脯氨酸、羟脯氨酸含量
E.
谷氨酰胺促进肠道复苏,减轻缺血再灌流损害,减轻胰岛素抵抗
【单选题】冷激式合成塔的主要缺点是()。
A.
床层阻力大
B.
催化剂装填量大
C.
氨合成率低
D.
结构复杂
【单选题】— You're quite free now, I think. — ________, I have tons of things to do! [    ]
A.
On the contrary
B.
On average
C.
On the other hand
D.
On condition
【单选题】And much of that assessment was, and still is, based on a perceived lack of things we’re told we should want or have.
A.
And much of that evaluation was, and still is, based on a feeling that we are short of things we ought to have because of the messages from the mass media.
B.
And much of that assessment was, and still is, based on a lack of understanding of the things we’re told we should want to have.
【单选题】And much of that assessment was, and still is, based on a perceived lack of things we're told we should want or have.
A.
And much of the assessment was, and still is, based on a lack of understanding of the things we're told we should want or have.
B.
And much of that evaluation was, and still is, based on a feeling that we are short of things we ought to have because of the messages from the mass media.
【单选题】不属于编制施工成本计划的方法是(     )。
A.
按施工成本组成编制施工成本计划
B.
按子项目组成编制施工成本计划
C.
按工程进度编制施工成本计划
D.
按施工预算编制施工成本计划
【单选题】氨是无机化合物制冷剂,从十九世纪到现在一直采用,但它的主要缺点是( )。
A.
不稳定
B.
不易控制
C.
气味难闻
D.
毒性大
【单选题】通常肝病患者的主要营养代谢特点是( )。
A.
血浆总蛋白升高
B.
负氮平衡加重
C.
支链氨基酸/芳香氨基酸(BCAA/AAA)比值升高
D.
水溶性维生素缺乏
E.
脂肪含量降低
【单选题】有关氨基酸的主要作用特点,下列选项错误的是
A.
支链氨基酸可减少肌蛋白分解并促使其合成,增加用量对肝损害的修复有利
B.
鸟氨酸α酮戊二酸盐对抗分解代谢,减少肌肉释放氨基酸,提高前白蛋白及视黄醇结合蛋白水平
C.
精氨酸是肠黏膜细胞、淋巴细胞的主要能源,有效预防肠源性感染
D.
精氨酸可刺激胰岛素、生长激素分泌,增加创面脯氨酸、羟脯氨酸含量
E.
谷氨酰胺促进肠道复苏,减轻缺血再灌流损害,减轻胰岛素抵抗
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