语音四要素指的是（）和（）。
参考答案：音高、音强、音长；音质
At the conference, political leaders from many countries promised to work together to defend the
world ________ terrorism and other threats. [ ]
A. for
B. without
C. beyond
D. against
某建筑嵌岩桩基桩径为800mm，桩底端嵌入倾斜的完整岩的全断面最小深度ι（m）应为下列（）项。（）
A.0.16
B.0.32
C.0.5
D.0.8
