皮皮学，免费搜题
登录
搜题
【多选题】
商务信函一般由标题、称呼、正文、结尾、( )组成。A.
署名
B.
日期
C.
回复要求
D.
附件
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【多选题】What are some of the problems associated with fuel cell technology? Click on 2 answer choices.
A.
Noise pollution
B.
Public acceptance
C.
Supplies of hydrogen
D.
Investment in infrastructures
【单选题】What did Fabio Hendry and Seongil Choi do according to the news ?
A.
They created a method called selective laser sintering.
B.
They used metal or plastic powder for various objects.
C.
They developed a method for hardening the nylon powder into solid objects.
D.
They exhibited 12 artistic stools.
【单选题】What did Fabio Hendry and Seongil Choi do according to the news ?
A.
They created a method called selective laser sintering.
B.
They used metal or plastic powder for various objects.
C.
They developed a method for hardening the nylon powder into solid objects.
D.
They exhibited 12 artistic stools.
【单选题】His grandparents used to ________ a walk after dinner, but now they are used to ________ a walk after breakfast.
A.
take, take
B.
taking, taking
C.
taking, take
D.
take, taking
【单选题】He used to to school by bike but he is used to to school now.
A.
go; walking
B.
go; walk
C.
going; walk
相关题目：
参考解析：
知识点：
题目纠错 0
发布
