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【判断题】
( )由于表面粗糙度高度参数有三种,因而标注数值前都必须注明相应的参数符号。A.
正确
B.
错误
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
【单选题】I ____ a precious book in a used book store. It became an important source of reference for my paper.
A.
stumbled upon
B.
stumble upon
C.
stumbled over
D.
stumble into
【单选题】Look! This is my new room, and that’s ______.
A.
John and his brother’s
B.
John's and his brother’s
C.
John and his brother
D.
John's and his
【单选题】My new profile photo got 56 _______. That’s more than I expected!
A.
likes
B.
trolls
C.
memes
D.
trends
【单选题】The cottage will be cold.Make sure ___ the heater.
A.
you light
B.
lighting
C.
you’ll light
D.
for lighting
【简答题】完全的;绝对的;纯粹的
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