语音有三种属性，它们是（）属性、（）属性和（）属性。

A. 生理属性
B. 物理属性
C. 社会属性
D. 自然属性

A. The letter is a short and introductory document in the standard business letter format.
B. In the job-application context it is a self-introducing letter prepared by a job applicant and is sent with the person’s CV or resume to a prospective employer.
C. It gives an overview of the applicant’s skills and experience and presents evidence of how and why the applicant is qualified for the position.
D. It asks questions about possible job opportunities.

A. enthusiastic and confident
B. pretentious and boastful
C. polite and focused
D. sincere and friendly