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【判断题】
里特曼指数σ是指钾、钠氧化物占氧化物的百分比。
A.
正确
B.
错误
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举一反三
【单选题】希腊文化中的酒神代表着什么力量?()
A.
爱情
B.
根基
C.
梦想
D.
友谊
查看完整题目与答案
【多选题】How are the cytoplasms of adjacent plant cells connected via plasmodesmata?
A.
The cytoplasms of adjacent plant cells are connected via minute communicating channels called plasmodesmata, which span the intervening cell walls.
B.
In contrast to gap-junction channels, plasmodesmata are cytoplasmic channels lined with plasma membrane. It usually also contains a fine tubular structure, the desmotubule, derived from smooth endoplasmic reticulum.
C.
Thus in plants, the cytoplasm is, in principle, continuous from one cell to the next, allowing the passage of both small and large molecules—including some proteins and regulatory RNAs.
D.
The controlled traffic of transcription regulators and regulatory RNAs from one cell to another is important in plant development.
查看完整题目与答案
【单选题】线路允许速度vmax≤120km/h,钢轨硬弯大于( )mm时,应及时处理。
A.
0.3
B.
0.5
C.
1
D.
2
查看完整题目与答案
【单选题】What is the common part of animal cells and plant cells?
A.
Chloroplast
B.
Bubble
C.
Cell membrane
D.
Cell wall
查看完整题目与答案
【单选题】线路允许速度vmax≤120km/h,钢轨顶面擦伤深度超过( )mm时为重伤钢轨。
A.
0.3
B.
0.5
C.
1
D.
2
查看完整题目与答案
【简答题】读材料回答下列问题。 材料一　2011年春节期间，为满足市场的需求，大批的新鲜蔬菜瓜果从海南运往。 材料二 和田地区保护绿洲的三道防线示意图 (1)海南岛和发展农业生产的气候优势分别为(　　) A光照水源        B．热量　光照    C．降水　热量   D．热量　水源 (2)受地理位置、地形、资源等因素的影响，两省区的主要交通方式除了公路、铁路和航空运输外，海南还有__...
查看完整题目与答案
【单选题】Which structures are found in plant cells but not in animal cells?
A.
centrioles
B.
mitochondria
C.
nucleoli
D.
plasmodesmata
查看完整题目与答案
【单选题】Plant cells can be distinguished from animal cells by the presence of _____________ .
A.
lipoprotein
B.
cell wall
C.
cytoplasm
D.
plasma membrane
查看完整题目与答案
【单选题】线路允许速度vmax≤120km/h,焊缝凹陷大于( )时,应及时处理。
A.
0.5㎜
B.
1.5㎜
C.
1mm
D.
0.3㎜
查看完整题目与答案
【单选题】线路允许速度vmax≤120km/h,焊缝凹陷大于( )时,应及时处理。
A.
0.5mm
B.
1.5mm
C.
1mm
D.
0.3mm
查看完整题目与答案
相关题目：
【单选题】希腊文化中的酒神代表着什么力量?()
A.
爱情
B.
根基
C.
梦想
D.
友谊
查看完整题目与答案
【多选题】How are the cytoplasms of adjacent plant cells connected via plasmodesmata?
A.
The cytoplasms of adjacent plant cells are connected via minute communicating channels called plasmodesmata, which span the intervening cell walls.
B.
In contrast to gap-junction channels, plasmodesmata are cytoplasmic channels lined with plasma membrane. It usually also contains a fine tubular structure, the desmotubule, derived from smooth endoplasmic reticulum.
C.
Thus in plants, the cytoplasm is, in principle, continuous from one cell to the next, allowing the passage of both small and large molecules—including some proteins and regulatory RNAs.
D.
The controlled traffic of transcription regulators and regulatory RNAs from one cell to another is important in plant development.
查看完整题目与答案
【单选题】线路允许速度vmax≤120km/h,钢轨硬弯大于( )mm时,应及时处理。
A.
0.3
B.
0.5
C.
1
D.
2
查看完整题目与答案
【单选题】What is the common part of animal cells and plant cells?
A.
Chloroplast
B.
Bubble
C.
Cell membrane
D.
Cell wall
查看完整题目与答案
【单选题】线路允许速度vmax≤120km/h,钢轨顶面擦伤深度超过( )mm时为重伤钢轨。
A.
0.3
B.
0.5
C.
1
D.
2
查看完整题目与答案
【简答题】读材料回答下列问题。 材料一　2011年春节期间，为满足市场的需求，大批的新鲜蔬菜瓜果从海南运往。 材料二 和田地区保护绿洲的三道防线示意图 (1)海南岛和发展农业生产的气候优势分别为(　　) A光照水源        B．热量　光照    C．降水　热量   D．热量　水源 (2)受地理位置、地形、资源等因素的影响，两省区的主要交通方式除了公路、铁路和航空运输外，海南还有__...
查看完整题目与答案
【单选题】Which structures are found in plant cells but not in animal cells?
A.
centrioles
B.
mitochondria
C.
nucleoli
D.
plasmodesmata
查看完整题目与答案
【单选题】Plant cells can be distinguished from animal cells by the presence of _____________ .
A.
lipoprotein
B.
cell wall
C.
cytoplasm
D.
plasma membrane
查看完整题目与答案
【单选题】线路允许速度vmax≤120km/h,焊缝凹陷大于( )时,应及时处理。
A.
0.5㎜
B.
1.5㎜
C.
1mm
D.
0.3㎜
查看完整题目与答案
【单选题】线路允许速度vmax≤120km/h,焊缝凹陷大于( )时,应及时处理。
A.
0.5mm
B.
1.5mm
C.
1mm
D.
0.3mm
查看完整题目与答案