多项选择题

以英语为母语的人难感知的对立有：（） A. 音节末的送气 B. 音节首清不送气塞音与浊塞音 C. 有无喉塞音 D. 齿龈音与卷舌音

你可能感兴趣的试题

单项选择题

时，后轴的制动效率为。

A．50.7%
B．60%
C．40%
D．49.30%

多项选择题

In industry, SiH2Cl2 is the most popular source material for epitaxial growth of Si. This is because
A、the growth temperature is lower than using other source materials.
B、the growth temperature is higher than using other source materials.
C、the growth temperature is conducive to reduce the dopant redistribution.
D、the growth temperature is conducive to reduce particulation.