Soon they could see the steam ______ from the wet clothes.
A. to rise
B. rising
C. risen
D. be rising
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I saw him ______ away on a stretcher (担架).
A. carried
B. carrying
C. to be carried
D. being carried
She was not interested in the question ______.
A. discussing
B. be discussed
C. being discussed
D. to discuss
运用后代选择器将下面的
标签内的字变为蓝色,下面选项正确的是()
沧海月明珠有泪,蓝田日暖玉生烟
A. div p{color:blue;}
B. div+p{color:blue;}
C. div~p{color:blue;}
D. div>p{color:blue;}
电压型逆变电路,输出( )为方波。
A. 电压
B. 电流