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【多选题】
下列化合物遇碱显黄色,需经氧化后红色的是( )
A.
羟基蒽醌
B.
蒽酚
C.
蒽酮
D.
二蒽酮
E.
羟基蒽醌
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【单选题】某双链DNA分子含有200个碱基,一条链上A∶T∶G∶C=1∶2∶3∶4,则该DNA分子()
A.
含有4个游离的磷酸基
B.
连续复制两次,需要游离的腺嘌呤脱氧核苷酸210个
C.
四种含氮碱基A∶T∶G∶C=3∶3∶7∶7
D.
碱基排列方式共有4200种
【单选题】The engine is equipped with variable timed injector and electrical indicators. 02010269
A.
The engine is equipped with the injector and indicators.
B.
The engine is equipped with variable timed injector as well as electrical indicators.
C.
The engine is equipped with variable timed injector or electrical indicators.
D.
The engine is equipped with variable timed injector.
【单选题】injector
A.
喷嘴
B.
注射
C.
加油器
D.
增压器
【单选题】fuel injector
A.
喷油器
B.
发电机
C.
阀件
D.
曲轴
【判断题】人类所具有的强大的心理修护能力,对自身的发展具有重要作用。( )
A.
正确
B.
错误
【单选题】某双链DNA有200个碱基,一条链上A:T:G:C=1:2:3:4,则该DNA分子( )
A.
含有 4 个游离的磷酸基
B.
连续复制 2 次,需要游离的腺嘌呤脱氧核苷酸 210 个
C.
4 种碱基 A:T:G:C = 3 : 3 : 7 : 7
D.
碱基排列方式共有 4 100 种
【判断题】孢子丝菌病引起皮下感染皮肤溃烂,多在户外活动时伤口感染引起的。()
A.
正确
B.
错误
【单选题】某双链 DNA 有 200 个碱基,一条链上 A:T:G:C = 1 : 2 : 3 : 4 ,则该 DNA 分子
A.
含有 4 个游离的磷酸基
B.
连续复制 2 次,需要游离的腺嘌呤脱氧核苷酸 210 个 prefix="o" ns="urn:schemas-microsoft-com:office:office"? ?xml:namespace>
C.
4 种碱基 A:T:G:C = 3 : 3 : 7 : 7
D.
碱基排列方式共有 4 100 种
【单选题】The amount of fuel injected into a diesel engine cylinder by a unit injector is controlled by_______.
A.
the firing pressure in the cylinder
B.
a metering helix inside the pump
C.
varying the physical length of the plunger stroke
D.
varying the clearance between the injector cam and the injector rocker arm
【单选题】A typical fuel injector consists of two basic parts, the nozzle and the nozzle holder. 02010263
A.
One basic part of a typical injector is the filter.
B.
One basic part of a typical injector is the nut.
C.
One basic part of a typical injector is the nozzle nuts.
D.
One basic part of a typical injector is the nozzle.
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