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【单选题】
下列行为不属于合理冲撞条件的是（）。A.
冲撞的目的在的球。
B.
冲撞时球须在双方的控制范围内。
C.
一般用肩至肘关节（并贴紧身体）冲撞对方的相应部位。
D.
冲撞时使用了过分的力量。
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【简答题】生物信息学所用的方法和技术。
【简答题】应用文中所有的落款都是______在上,______在下占两行。
【单选题】You work as a network engineer， do you know an IPsec tunnel is negotiated within the protection of whichtype of tunnel？（）
A.
L2F tunnel
B.
L2TP tunnel
C.
GRE tunnel
D.
ISAKMP tunnel
【多选题】According to the plane shape of tunnel, it can be classified as
A.
Straight tunnel
B.
Single-line tunnel
C.
Curve tunnel
D.
Double-line tunnel
【单选题】Which of these statements best describes the major difference between an IPv4-compatible tunnel and a 6to4 tunnel？（）
A.
An IPv4-compatible tunnel is a static tunnel， but an 6to4 tunnel is a semiautomatic tunnel.
B.
The deployment of a IPv4-compatible tunnel requires a special code on the edge routers， but a 6to4 tunnel does not require any special code.
C.
An IPv4-compatible tunnel is typically used only between two IPv6 domains， but a 6to4 tunnel is used to connect to connect two or more IPv6 domains.
D.
For an IPv4-compatible tunnel， the ISP assigns only IPv4 addresses for each domain， but for a 6to4 tunnel， the ISP assigns only IPv6 addresses for each domain.
【单选题】4 If the total length of a tunnel is 800m , the tunnel is a
A.
Super long tunnel
B.
Long tunnel
C.
Medium long tunnel
D.
Short tunnel
【单选题】A wind tunnel is used for testing planes or plane models. In a wind tunnel air is blown over a plane or a model placed in a test section. Wind tunnel test sections are different in size depending on a...
A.
they are used for large planes
B.
they can produce a stronger wind
C.
they are built to conduct a high-speed test
D.
the air in them flows at a lower speed
【单选题】在已建"职工"表中有姓名、性别、出生日期等字段，查询并显示女职工年龄最小的职工姓名、性别和年龄，正确的SQL命令是
A.
SELECT 姓名,性别,MIN(YEAR(DATE())-YEAR([出生日期])) AS 年龄 FROM 职工 WHERE 性别=女
B.
SELECT 姓名,性别,MIN(YEAR(DATE())-YEAR([出生日期])) AS 年龄 FROM 职工 WHERE 性别="女"
C.
SELECT 姓名,性别,年龄 FROM 职工 WHERE 年龄=MIN(YEAR(DATE())-YEAR([出生日期])) AND 性别=女
D.
SELECT 姓名,性别,年龄 FROM 职工 WHERE 年龄=MIN(YEAR(DATE())-YEAR([出生日期])) AND 性别="女"
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