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听力原文: The Giant Panda is also known as the 'Panda Bear', 'Bamboo Bear', or in Chinese as 'Daxiongmao', which means 'large bear cat'. The scientific name means 'black and white cat-footed animal'. As for the history of the Giant Panda, it is said that the earliest appearance of the Panda was somewhere between the late Pliocene or early Pleistocene periods—two to three million years ago. Panda fossils have been discovered in the areas of Burma and Vietnam and in particular, East China, as far north as Beijing. In the second century AD the Giant Panda was a rare and semi-divine animal inside China. In the Han Dynasty, the emperor's garden, in what was then known as the capital—Xi'an, held nearly 40 rare animal species, of which the panda was the most highly treasured. Scientists have debated for more than a century whether Giant Pandas actually do belong to the bear family or whether they are more related to the raccoon family or perhaps a separate family of their own. This is because the Giant Panda and its cousin, 'the Lesser' or 'Red Panda', share many characteristics with both bears and raccoons. Recent DNA analysis indicates that Giant Pandas are most definitely of the bear species although different enough to be put into its own sub family. The red pandas are more closely related to raccoons. Giant Pandas are categorized in the bear family while Red Pandas are categorized in the raccoon family. (33)
A.
One to three million years ago.
B.
Two to three million years ago.
C.
One to three billion years ago.
D.
Two to three billion years ago.
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【单选题】由于离心泵叶轮形状不同,流体阻力损失也不同,阻力损失最大的为( )
A.
后弯叶轮
B.
直叶轮
C.
前弯叶轮
D.
β2=90° 的叶轮
【单选题】壳管干式蒸发器,适用于()制冷剂。
A.
R502
B.
R717
C.
R22
D.
R13
【单选题】落实全面协调可持续的基本要求,就是要促进现代化建设各个环节,各个方面相协调,促进( )相协调。(易)(第七章)
A.
生产关系与生产力,上层建筑与经济基础
B.
生产力与生产关系,
C.
精神文明与物质文明
D.
经济基础与上层建筑
【判断题】判断:若放大电路的负载固定,为使其电压增益稳定,可以引入电压负反馈,也可以引入电流负反馈。
A.
正确
B.
错误
【单选题】下列各项与子宫颈癌患者淋巴转移的发生率直接相关的是
A.
癌灶范围
B.
患者年龄
C.
临床期别
D.
地埋环境
【单选题】落实全面协调可持续的基本要求,就是要促进现代化建设各个环节、各个方面相协调,促进( )相协调。
A.
生产力与生产关系、经济基础与上层建筑
B.
生产关系与生产力、上层建筑与经济基础
C.
精神文明与物质文明
D.
国内发展与改革开放
【简答题】说明:利用OptionMenu和ContextMenu完成如下设计: 截图:
【单选题】由离心泵叶轮形状不同,流体阻力损失也不同,阻力损失最大的为 ( )
A.
后弯叶轮
B.
直叶轮
C.
前弯叶轮
D.
β 2 = 90° 的叶轮
【多选题】李某出版一本书,稿酬所得为3万元,未按照法律的规定缴纳税款,在其收到税务机关限期缴纳税款通知书的期限届满后,仍然拖欠税款 1500元。税务机关对此采取的下列做法中不符合法律的规定有哪些
A.
书面通知纳税人开户银行或者其他金融机构冻结纳税人的金额相当于应纳税款的存款
B.
拍卖李某一套多余的住房
C.
扣押李某一幅价值1550元的古玩字画
D.
税务机关可以对李某处以750元以上 7500元以下的罚款
【判断题】若放大电路的负载固定,为使其电压增益稳定,可以引入电压负反馈,也可以引入电流负反馈。( )
A.
正确
B.
错误
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