皮皮学，免费搜题
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搜题
【多选题】
网页 文件的扩展名为A.
.js
B.
.html
C.
.htm
D.
.css
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】－How do I_________ my homework ? －Click“print” and“ OK”.
A.
write
B.
do
C.
save
D.
print
【单选题】How do int-jet printer works ? .
A.
They spray ionized tiny drops of int onto a page to create an image.
B.
They shine a laser beam to produce an image on a drum.
C.
They use a set of closely spaced pins and a ribbon to print letters or other characters on a page.
D.
Characters are formed by heated elements being placed in contact with special heat-sensitive paper.
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