The phrase cut back on means ______ in the passage.
A. cut short
B. reduce
C. return to
D. turn back
查看答案
Why were early umbrellas difficult to use？
A. Because they were very big.
Because they were very small.
C. Because they were made of wood.
以下关于网络安全漏洞的描述中，哪项是错误的？——
A. 网络服务是通过各种协议来完成的
B. 形式化证明的方法可有效防范黑客攻击
C. 网络协议的漏洞是Intemet面临的一个严重安全问题
D. 我们常用的’relnet、FFP、HTFP协议，在安全方面都存在一定的问题
The main point of paragraph 4 is ______.
A. why geriatric physicians are paid less than other physicians
B. why doctors show little interest in being geriatric physicians
C. what are the major problems with the elderly care industry
D. what can be done to ensure the healthy development of elderly care
【B1】
A. thing
B. school
C. homework
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