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【单选题】
下列哪些营养素不属于非产热营养素。
A.
维生素
B.
水
C.
碳水化合物
D.
矿物质
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举一反三
【单选题】A morphogen is
A.
a cell or group of cells that signal other cells to become determined in a specific way
B.
a gene that causes a cell or group of cells to adopt a particular shape
C.
a signaling molecule that causes the differentiation of neighboring cells
D.
a signaling molecule that confers concentration-dependent positional information
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【单选题】Which of the following is true about them?
A.
They didn't have 20 years of communication.
B.
They come from the same country.
C.
They are husband and wife.
D.
Their stories were turned into  novels
查看完整题目与答案
【单选题】Activin is a protein that normally exists in a gradient within certain tissues in developing embryos. Certain undifferentiated cells cultured without activin produce epidermal cells. However, activin ...
A.
transcription factor.
B.
cell-surface receptor.
C.
morphogen.
D.
second messenger.
E.
activator.
查看完整题目与答案
【判断题】由于汽车行驶中,当车速一定时,空气阻力系数越大,则空气阻力消耗的汽车发动机功率就越小。
A.
正确
B.
错误
查看完整题目与答案
【简答题】听下面一段材料，回答1-3题。 1. Why didn't Jim write to the woman last month? [     ] A. Because he couldn't write. B. Because he was traveling in another country. C. Because he never wrote letters when he was on ...
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【简答题】Join the two independent clauses to make a compound sentence. Use one of the coordinating conjunctions (and, but, for, or, nor, so, yet). Remember to use a comma before the connecting word. a. He enjo...
查看完整题目与答案
【单选题】Which of the following sentence is true?
A.
The doctor told the man to visit a beautiful city of the country for a month.
B.
The doctor didn't tell him what to do.
C.
After a month, the old man felt better.
查看完整题目与答案
【判断题】A morphogen is a protein that can restore totipotency to cells from an adult animal.
A.
正确
B.
错误
查看完整题目与答案
【简答题】完形填空。 Last January I was given a chance to work in another country. At first, I lived a 1 life, but soon I met a group of new friends and they were really nice. Then something 2 happened. One of our f...
查看完整题目与答案
【单选题】在全面进行社会主义建设的过程中,毛泽东曾针对“大跃进”的“左”的错误,为把实事求是的精神恢复起来,号召全党( )
A.
“大兴理论联系实际之风”
B.
“大兴调查研究之风”
C.
“大兴学习马克思列宁主义之风”
D.
“大兴求真务实之风”
查看完整题目与答案
相关题目：
【单选题】A morphogen is
A.
a cell or group of cells that signal other cells to become determined in a specific way
B.
a gene that causes a cell or group of cells to adopt a particular shape
C.
a signaling molecule that causes the differentiation of neighboring cells
D.
a signaling molecule that confers concentration-dependent positional information
查看完整题目与答案
【单选题】Which of the following is true about them?
A.
They didn't have 20 years of communication.
B.
They come from the same country.
C.
They are husband and wife.
D.
Their stories were turned into  novels
查看完整题目与答案
【单选题】Activin is a protein that normally exists in a gradient within certain tissues in developing embryos. Certain undifferentiated cells cultured without activin produce epidermal cells. However, activin ...
A.
transcription factor.
B.
cell-surface receptor.
C.
morphogen.
D.
second messenger.
E.
activator.
查看完整题目与答案
【判断题】由于汽车行驶中,当车速一定时,空气阻力系数越大,则空气阻力消耗的汽车发动机功率就越小。
A.
正确
B.
错误
查看完整题目与答案
【简答题】听下面一段材料，回答1-3题。 1. Why didn't Jim write to the woman last month? [     ] A. Because he couldn't write. B. Because he was traveling in another country. C. Because he never wrote letters when he was on ...
查看完整题目与答案
【简答题】Join the two independent clauses to make a compound sentence. Use one of the coordinating conjunctions (and, but, for, or, nor, so, yet). Remember to use a comma before the connecting word. a. He enjo...
查看完整题目与答案
【单选题】Which of the following sentence is true?
A.
The doctor told the man to visit a beautiful city of the country for a month.
B.
The doctor didn't tell him what to do.
C.
After a month, the old man felt better.
查看完整题目与答案
【判断题】A morphogen is a protein that can restore totipotency to cells from an adult animal.
A.
正确
B.
错误
查看完整题目与答案
【简答题】完形填空。 Last January I was given a chance to work in another country. At first, I lived a 1 life, but soon I met a group of new friends and they were really nice. Then something 2 happened. One of our f...
查看完整题目与答案
【单选题】在全面进行社会主义建设的过程中,毛泽东曾针对“大跃进”的“左”的错误,为把实事求是的精神恢复起来,号召全党( )
A.
“大兴理论联系实际之风”
B.
“大兴调查研究之风”
C.
“大兴学习马克思列宁主义之风”
D.
“大兴求真务实之风”
查看完整题目与答案