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【单选题】
辅助心脏，对血液运行具有推动和调节作用的是A.
肝的生理功能
B.
肺的生理功能
C.
肾的生理功能
D.
脾的生理功能
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举一反三
【多选题】关于物联网信息安全技术，以下表述正确的是
A.
物联网信息安全技术旨在保护物联网系统的硬件、软件和数据免遭破坏、更改和泄露。
B.
物联网信息安全的目标包括保证物联网信息的保密性、完整性、可用性、不可否认性和不可追踪性等。
C.
伪造IP地址、盗用登录口令、无线通信干扰都属于欺骗类攻击。
D.
密码技术是物联网信息安全的核心和关键。
【单选题】According to the text, to be 'thrown clear' of a serious accident is very dangerous because you______.
A.
may be knocked down by other cars
B.
may get seriously hurt being thrown out of the car
C.
may find it impossible to get away from the seat
D.
may get caught in the car door
【单选题】The speaker began to panic in the library becaus e ___ _
A.
she couldn ' t read anything
B.
she couldn ' t find anything
C.
she couldn ' t remember anything
【单选题】According to the passage, the first settlers used wood for their utensils and tools because it was ______.
A.
durable
B.
inexpensive
C.
available
D.
attractive
【多选题】关于物联网信息安全技术,以下表述正确的是
A.
伪造IP地址、盗用登录口令、无线通信干扰都属于欺骗类攻击。
B.
物联网信息安全的目标包括保证物联网信息的保密性、完整性、可用性、不可否认性和不可追踪性等。
C.
物联网信息安全技术旨在保护物联网系统的硬件、软件和数据免遭破坏、更改和泄露。
D.
密码技术是物联网信息安全的核心和关键。
【简答题】According to the author the concept of “environment” is difficult to explain because ________. A) it doesn’t distinguish between the organism and the environment B) it involves both internal and exter...
【单选题】以下关于叫早服务的表述正确的是()
A.
由地陪决定第二天的叫早时间并通知领队
B.
地陪和领队商定第二天的叫早时间
C.
地陪通知旅游者第二天的叫早时间
D.
领队通知酒店总服务台第二天的叫早时间
【单选题】Before fridges came into use， it was still possible for people to have fresh foods because 查看材料
A.
milk， meat， vegetables， etc. were delivered
B.
it has promoted the sales of many kinds of Commodities
C.
foods can be preserved
D.
most kids like iced soft drinks
E.
every housewife needs food
F.
the fridge produced when it is working
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