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【单选题】
建筑工程划分为( )类。A.
2
B.
3
C.
4
D.
5
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皮皮学刷刷变学霸
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【简答题】下图为花的结构模式图,请回答下列问题。(横线上填名称,方括号【】内填编号) 解剖一朵花,由下往上,从外向内的结构依次是花柄、花托、花萼、花冠、_____________、_____________。 很多植物的花冠有鲜艳的色彩,除了具有保护作用外,还有_____________的作用。 图中的胚珠是【 】,完成受精作用后,胚珠发育成_____________,【 】发育成果实。 ...
【单选题】Among the following four sentences, which is not a statement of generalization?( )
A.
Democracy is a state of mind
B.
A number of foreign countries were directly involved in U.S. territorial expansion.
C.
Students should not be allowed to smoke in the classroom.
D.
A wild stallion is powerful and fierce
【单选题】Among the following statements, which is tree about sea horse?
A.
The sea horse has a long snout that is not convenient for sucking.
B.
Sea horses have no scales at all.
C.
The sea horse is unable to grasp sea grass or coral.
D.
Sea horse can move very fast over long distance.
【简答题】按要求填空 ①写出下列物质的化学式：氨气 ；氧化铜 ； ②写出下列反应的化学反应式： a、高锰酸钾加热 ； b、二氧化碳通入澄清石灰水 ；
【简答题】在JPEG中使用了哪两种熵编码方法( )。 A.统计编码和算术编码 B.PCM编码和DPCM编码 C.预测编码和变换编码 D.哈夫曼编码和自适应二进制算术编码
【单选题】The researchers were disappointed because ______.
A.
the vaccines haven't shown any effect on volunteers in Thailand
B.
the vaccines didn't stop the HIV infection on those who were vaccinated
C.
the vaccines were strongly rejected by the people in Thailand
D.
the vaccines' effects is waiting to be verified at conference in Paris
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