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【单选题】
下列哪种指标在新鲜尿中出现表明膀胱内有细菌感染( )
A.
胆红素结晶
B.
尿酸胺结晶
C.
胆固醇结晶
D.
磺胺类结晶
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参考答案:
举一反三
【简答题】已知int i;float f;,下列正确的语句是() A.(int f)%i; B.int(f)%i; C.int(f%i); D.(int)f%i;
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【简答题】You ought to drive very cautiously on such a ______ day. (fog)
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【单选题】Some diesel engines are supercharged with a ()
A.
slam charger
B.
turbocharger
C.
fuel atomizer
D.
fuel injector
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【单选题】You are inspecting the lower main precision bearings on a diesel engine .You observe that about half the thin Babbitt linings are of a milky white colourThis condition is caused by _____.
A.
large dirt particles in the oil supply
B.
insufficient lubricating oil and overheating
C.
normal wear
D.
water contamination of the lube oil
查看完整题目与答案
【单选题】All diesel engines are classified as().
A.
four cycle
B.
compression ignition
C.
vacuum ignition
D.
external combustion
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【单选题】When you experience and observe your inflection point, you should stop your career at once.
A.
Y
B.
N
C.
NG
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【单选题】When you do an experiment, it is important that you have ____ patience to observe and record ___ whole process of the experiment [ ]
A.
a ; a
B.
the; the
C.
the ; a
D.
/; the
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【单选题】对生物碱盐溶解度比较小的溶剂是( )
A.
乙醚
B.
甲醇
C.
乙醇
D.
酸水
E.
水
查看完整题目与答案
【简答题】(9分)目前世界上比较先进的电解制碱技术是离子交换膜法。 (1)电解前,如果粗盐中SO 4 2 ˉ含量较高,必须添加试剂除去SO 4 2 ˉ,则按添加试剂顺序,依次发生反应的离子方程式为 。 (2)补齐下列电解饱和食盐水制烧碱的离子方程式: ______________________ __________________________________ (反应物) ...
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【单选题】下述实验能达到预期目的的是 实验内容 实验目的
A.
向1mL0.2mol/LNaOH溶液中滴入2滴0.1mol/LMgCl 2 溶液,产生白色沉淀后,再滴加2滴0.1mol/LFeCl 3 溶液,又生成红褐色沉淀 证明在相同条件下,溶解度Mg(OH) 2 >Fe(OH) 3
B.
向混有BaCO 3 沉淀的NaOH溶液中滴入已知浓度的盐酸(用酚酞作指示剂) 滴定其中NaOH含量
C.
两种一元碱溶液X和Y(X的pH比Y大l),分别加水稀释l00倍后,pH相等 证明稀释前c(X)=10c(Y)
D.
测定等物质的量浓度的HF与HCl溶液的pH,后者较小 证明非金属性Cl>F
查看完整题目与答案
相关题目:
【简答题】已知int i;float f;,下列正确的语句是() A.(int f)%i; B.int(f)%i; C.int(f%i); D.(int)f%i;
查看完整题目与答案
【简答题】You ought to drive very cautiously on such a ______ day. (fog)
查看完整题目与答案
【单选题】Some diesel engines are supercharged with a ()
A.
slam charger
B.
turbocharger
C.
fuel atomizer
D.
fuel injector
查看完整题目与答案
【单选题】You are inspecting the lower main precision bearings on a diesel engine .You observe that about half the thin Babbitt linings are of a milky white colourThis condition is caused by _____.
A.
large dirt particles in the oil supply
B.
insufficient lubricating oil and overheating
C.
normal wear
D.
water contamination of the lube oil
查看完整题目与答案
【单选题】All diesel engines are classified as().
A.
four cycle
B.
compression ignition
C.
vacuum ignition
D.
external combustion
查看完整题目与答案
【单选题】When you experience and observe your inflection point, you should stop your career at once.
A.
Y
B.
N
C.
NG
查看完整题目与答案
【单选题】When you do an experiment, it is important that you have ____ patience to observe and record ___ whole process of the experiment [ ]
A.
a ; a
B.
the; the
C.
the ; a
D.
/; the
查看完整题目与答案
【单选题】对生物碱盐溶解度比较小的溶剂是( )
A.
乙醚
B.
甲醇
C.
乙醇
D.
酸水
E.
水
查看完整题目与答案
【简答题】(9分)目前世界上比较先进的电解制碱技术是离子交换膜法。 (1)电解前,如果粗盐中SO 4 2 ˉ含量较高,必须添加试剂除去SO 4 2 ˉ,则按添加试剂顺序,依次发生反应的离子方程式为 。 (2)补齐下列电解饱和食盐水制烧碱的离子方程式: ______________________ __________________________________ (反应物) ...
查看完整题目与答案
【单选题】下述实验能达到预期目的的是 实验内容 实验目的
A.
向1mL0.2mol/LNaOH溶液中滴入2滴0.1mol/LMgCl 2 溶液,产生白色沉淀后,再滴加2滴0.1mol/LFeCl 3 溶液,又生成红褐色沉淀 证明在相同条件下,溶解度Mg(OH) 2 >Fe(OH) 3
B.
向混有BaCO 3 沉淀的NaOH溶液中滴入已知浓度的盐酸(用酚酞作指示剂) 滴定其中NaOH含量
C.
两种一元碱溶液X和Y(X的pH比Y大l),分别加水稀释l00倍后,pH相等 证明稀释前c(X)=10c(Y)
D.
测定等物质的量浓度的HF与HCl溶液的pH,后者较小 证明非金属性Cl>F
查看完整题目与答案
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