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【单选题】
下列有关我国农作物栽培的叙述中,正确的是
A.
我国是世界上最早栽培水稻和茶树的国家
B.
我国是世界上最早栽培玉米的国家
C.
我国是世界上最早栽培可可和咖啡的国家
D.
我国是世界上最早栽培橡胶的国家
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参考答案：
举一反三
【判断题】在剖视图的标注中,当单一剖切平面通过物体的对称面或基本对称面,且剖视图按投影关系配置,中间又没有其他图形隔开时,可省略箭头。
A.
正确
B.
错误
查看完整题目与答案
【单选题】He is such ____ and _____ than his brother.
A.
fitter,stronger
B.
fiter,stronger
C.
fitest,strongest
D.
fittest, strongest
查看完整题目与答案
【单选题】he is such a good teacher______we love and respect
A.
That
B.
So
C.
Who
D.
As
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【单选题】He is strict in everything and strict with everyone.＿＿＿＿＿.
A.
My father is always such
B.
My father is always so a strict man
C.
Such is my father
D.
So a strict man is my father
查看完整题目与答案
【单选题】变压器的电压比为3:1，若一次输入6V的交流电压，则二次电压为(    )。
A.
18V    
B.
6V    
C.
2V    
D.
0V
查看完整题目与答案
【判断题】当剖视图按投影关系配置,且形体对称,中间又没有其他图形隔开时,可省略标注。
A.
正确
B.
错误
查看完整题目与答案
【判断题】当剖切平面通过零件的对称平面或基本对称的平面,且剖视图按投影关系配置、中间又没有其他图形隔开时,可省略标注。
A.
正确
B.
错误
查看完整题目与答案
【简答题】用定于从句改写下列句子: Our class is a big family ; It consists of 12 girls and 50 boys. Most of them are mainly from the countryside. Zhao Qiang is a kind-hearted boy. He is always ready to help others. He is s...
查看完整题目与答案
【简答题】当单一剖切平面通过机件对称面或基本对称的平面,且剖视图按投影关系配置,中间又没有其他图形隔开时, 。
查看完整题目与答案
【简答题】Listen again and choose the best answer to each of the following questions. 1) How is Tim? A. He is tired and sleepy. B. He is upset and worried. C. He is upset and tired. 2) Has Tim’s family experien...
查看完整题目与答案
相关题目：
【判断题】在剖视图的标注中,当单一剖切平面通过物体的对称面或基本对称面,且剖视图按投影关系配置,中间又没有其他图形隔开时,可省略箭头。
A.
正确
B.
错误
查看完整题目与答案
【单选题】He is such ____ and _____ than his brother.
A.
fitter,stronger
B.
fiter,stronger
C.
fitest,strongest
D.
fittest, strongest
查看完整题目与答案
【单选题】he is such a good teacher______we love and respect
A.
That
B.
So
C.
Who
D.
As
查看完整题目与答案
【单选题】He is strict in everything and strict with everyone.＿＿＿＿＿.
A.
My father is always such
B.
My father is always so a strict man
C.
Such is my father
D.
So a strict man is my father
查看完整题目与答案
【单选题】变压器的电压比为3:1，若一次输入6V的交流电压，则二次电压为(    )。
A.
18V    
B.
6V    
C.
2V    
D.
0V
查看完整题目与答案
【判断题】当剖视图按投影关系配置,且形体对称,中间又没有其他图形隔开时,可省略标注。
A.
正确
B.
错误
查看完整题目与答案
【判断题】当剖切平面通过零件的对称平面或基本对称的平面,且剖视图按投影关系配置、中间又没有其他图形隔开时,可省略标注。
A.
正确
B.
错误
查看完整题目与答案
【简答题】用定于从句改写下列句子: Our class is a big family ; It consists of 12 girls and 50 boys. Most of them are mainly from the countryside. Zhao Qiang is a kind-hearted boy. He is always ready to help others. He is s...
查看完整题目与答案
【简答题】当单一剖切平面通过机件对称面或基本对称的平面,且剖视图按投影关系配置,中间又没有其他图形隔开时, 。
查看完整题目与答案
【简答题】Listen again and choose the best answer to each of the following questions. 1) How is Tim? A. He is tired and sleepy. B. He is upset and worried. C. He is upset and tired. 2) Has Tim’s family experien...
查看完整题目与答案
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