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【单选题】
对于记录型信号量,在执行一次wait操作时,信号量的值是( )时,进程应阻塞。A.
大于0；
B.
小于0；
C.
大于等于0；
D.
小于等于0。
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反馈参考答案：
举一反三
【单选题】She was sent a box of chocolates along with a letter saying she was fired.（ ）
A.
killed
B.
shot
C.
dismissed
D.
murdered
【单选题】She wrote back to him ________ she received his letter.
A.
while
B.
before
C.
whether
D.
as soon as
【简答题】A Letter of Admission 录取信 Write a letter of about 100 words based on the following situation: Li Mings application for admission to Washington University has been accepted. Write a letter to offer him...
【简答题】A. help B. nest C. letter D. she
【多选题】目前的广告媒体一般分为 ( ) 三大类。 A 触觉媒体 B 视觉媒体 C 感觉媒体 D 视听两用媒体 E c
A.
触觉媒体
B.
视觉媒体
C.
感觉媒体
D.
视听两用媒体
E.
听觉媒体
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