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【单选题】
仅一端有固位体，桥体与固位体之间为同定连接的是A.
完全固定桥
B.
悬臂固定桥
C.
应力中断式同定桥
D.
复合同定桥
E.
固定一可摘联合桥
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举一反三
【多选题】以下哪些选项是跨境电子商务存在的问题? ( )
A.
跨境电子商务比例严重失衡
B.
产品同质化严重，出口盈利能力有待进一步提升
C.
通关成为跨境电子商务交易最大壁垒
D.
跨境电子商务人才缺失
【简答题】有梁楼盖以 为支座的板构件,无梁楼盖以 为支座的板构件。
【单选题】Question 6 is based on the news report you have just heard.
A.
. A) It intends to keep its traditional diet.
B.
B) It wants to expand its own farming.
C.
C) It is afraid of the spread of disease.
D.
D) It is worried about unfair competition.
【单选题】在一棵度为4的树T中,若20个度为4的结点,10个度为3的结点,1个度为2的结点,10个度为1的结点,则树T中的叶结点个数是( )。
A.
41
B.
82
C.
113
D.
122
【单选题】Question6 is based on the news report you have just heard.
A.
Engineering problems.
B.
The air pollution it produced.
C.
Inadequate funding.
D.
The opposition from the military.
【单选题】NH 4 CN 水溶液的质子条件平衡式为
A.
[H+] = [NH3]+ [OH-]
B.
[H+] + 2[HCN] = [OH-]
C.
[H+] + [HCN] = [NH3]
D.
[H+] + [HCN] = [NH3] + [OH-]
【简答题】当前跨境电子商务存在的问题是什么？
【单选题】Question 6 is based on the news report you have just heard.
A.
The boy's father.
B.
Soldiers, police and volunteers.
C.
Japan's military.
D.
Child psychiatrists.
【单选题】Question 9 is based on the same passage of question 6.What is implied in the passage?
A.
People started to associate colors with emotions long time ago.
B.
How colors show emotions is a new research topic.
C.
People wearing different colors usually feel happy.
D.
The colors people choose affect their physical health.
【简答题】简述实体的八叉树表示法。
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