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【判断题】
利用果胶水溶液在适当条件下可以形成凝胶的特性可以生产果冻。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】What happened in 1986?
A.
Retirement stopped being practiced.
B.
Age limitation in retirement was abolished.
C.
Age discrimination was legally abolished.
D.
Retired people were no longer entitled to pensions.
【简答题】A．unemployment B．challenge C．competition D．retirement
【单选题】What is the advantage of the retirement savings?
A.
Government withdraws a light tax on the retirement savings.
B.
Employees can get money as the retirement savings from their employers.
C.
Anyone with the retirement savings is qualified for a 401K plan.
D.
More than 50% Americans enjoy free money in the retirement savings.
【简答题】运行IP协议的Internet可以为其高层用户提供___________的、面向无连接的、尽最大努力的数据报投递服务。
【单选题】PCB设计中电路板的标注尺寸、边框等信息所用工作层是（）
A.
TopLayer顶层
B.
Mechanical layer机械层
C.
Silkscreen丝印层
D.
BottomLayer底层
【简答题】IP协议可以为其高层用户提供3种服务：不可靠的数据投递服务、______和尽最大努力投递服务。
【简答题】退休咨询(pre-retirement counseling)
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