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【单选题】
我国是多种名花的故乡，在长期的选育过程中，培育了丰富多样的品种资源，如梅花品种超过300个。以上描述的花卉资源多样性是A.
遗传多样性
B.
物种多样性
C.
生态系统多样性
D.
景观多样性
E.
生物多样性
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皮皮学刷刷变学霸
举一反三
【单选题】Hawaii, the newest state in the United States, is a 【C1】______ of eight large islands and many small 【C2】______ in the Central Pacific Ocean, about 2,200 miles west of San Francisco. Hawaii was probab...
A.
group
B.
bunch
C.
gathering
D.
sort
【单选题】The control panel uses all the newest technology and is considered state-of-the-art. 该句中的形容词有
A.
control
B.
considered
C.
state-of-the-art
【单选题】Building Confidence The two arms of Coega, South Africa's newest port, extend into the Indian Ocean gracefully. These are built from thousands of huge, oddly-shaped, 30-ton concrete blocks. They are d...
A.
Y
B.
N
C.
NG
【单选题】第五套人民币1999年版100元、50元纸币共有（）种公众防伪特征，2005年版第五套人民币100元、50元纸币共有（）种公众防伪特征。
A.
9，10
B.
9，11
C.
10，11
D.
10，10
【判断题】轨向是指钢轨头部内侧面沿钢轨方向的横向凹凸不平顺,即直线上轨道是否直, 曲线上轨道是否圆顺。直线上以 10m 弦在轨头内侧顶面下 16mm 处量取最大矢度。
A.
正确
B.
错误
【单选题】The two newest states which joined the United States are
A.
Alaska and Florida.
B.
Hawaii and Oregon.
C.
Alaska and Hawaii.
D.
California and New Mexico.
【单选题】The two newest states which joined the United States are ______.
A.
Alaska and Kentucky.
B.
Hawaii and Arizona.
C.
Alaska and Hawaii.
D.
Vermont and New Mexico.
【单选题】The two newest states which joined the United States of America are
A.
Alaska and Florida.
B.
Hawaii and Oregon.
C.
Alaska and Hawaii.
D.
California and New Mexico.
【简答题】The two newest states are _________ and ________ .
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