Why does the speaker ask the addressee to write in English a. Because the speaker cannot read Chinese. b. Because English is the working language. c. Because Chinese cannot be displayed properly in the speaker’s computer. d. Because English is the language in which the speaker’s computer is designed.

多形红斑是一种以（）和（）为典型皮损的急性炎症性皮肤病，常伴发（）损害。