Affricates are the combination of a plosive sound and a fricative sound.
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/t∫/ is a blend combined of /t/ and /∫/. It starts out as a /t/ stop and then the tongue moves into the position for /∫/.
A. 对
B. 错
There are 2 affricates in English: /t∫, dr/.
A. 对
B. 错
每个域中至少有（）台域控制器
A. 1
B. 2
C. 3
D. 4
一个域用户账户的显示名在（）里必须唯一
A. 域
B. 域树
C. 域林
D. OU
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