| Artificial flowers are used for
scientific as Well as for decorative purposes. They are made from (51)
of materials, such as wax and glass, so skillfully that they can
scarcely be (52) from natural flowers. In making such models,
painstaking skill and artistry are called for, (53) thorough
knowledge of plant structure. The (54) of glass flowers in
the Botanical Museum of Harvard University is the most famous in North America
and is widely known (55) the scientific world. (56)
, there are several thousand models in colored glass, the work of two
artist naturalists, Leopold Blalschka and his son Rudolph. The intention was to have the collection (57) at least one member of each flower family native to the United States. (58) it was never completed, it contains more than seven hundred species A. sustained B. maintained C. kept D. concealed [多项选择]根据《服务贸易总协定》的定义，服务贸易的方式有( )
A. 跨境交付 B. 境外消费 C. 货物转移 D. 商业存在 E. 自然人流动 [单选题]驾驶大型货车在长下坡路段刹车失灵时,以下做法正确的是什么?
A.持续使用喷淋装置降温 B.逐级或越一级减挡,并间歇性使用驻车制动器 C.将制动踏板猛踩到底制动 D.越两级挡位减挡 [判断题]( )当新轨组布置在道心时,靠近外股的新轨组间有一空头,靠近里股的新轨组间应有一搭头。
A.正确 B.错误 [判断题]临时用电架空线最大弧垂与地面距离,在施工现场不小于2米( )
A.正确 B.错误 [单选题]超声波法，正常运行设备220kV~750kV电压等级设备检测周期为1年（ ）次
A.1 B.2 C.3 D.4 [判断题]吊车严禁在带电的馈电线或接触网下面进行装卸作业，在馈电线或接触网附近作业时，起重臂和钢丝绳及装卸物件的边缘与带电部分的距离不应小于2m。（ ）【《电信函〔2009〕36号关于印发《乌鲁木齐铁路局电气化铁路电务人员技术作业安全规则》的通知》第20条】
A.正确 B.错误 [单项选择]Questions 11 to 13 are based ore the following passage. At the end of the passage, you will be given 15 seconds to answer the questions.
Now listen to the passage. Which is NOT the mentioned result of the change of the way of living A. They learnt to live together peacefully. B. They learnt to help one another when in need. C. They learnt to fight against common enemies with joint efforts. D. They learnt to invent more things to make life easier. [单选题]自承式结构的派生结构特征的代号（ ）。
A.C B.L C.X D.Y [单项选择] 下面有3篇短文，每篇短文后有5道题。请根据短文内容，为每题确定1个最佳选项。 {{B}}第一篇{{/B}}
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