皮皮学，免费搜题
登录
搜题
【单选题】
红色翡翠致色的机理是:A.
铁离子致色
B.
镍离子致色
C.
铬离子致色
D.
微粒赤铁矿致色
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’m sure your suggestion will _______ the problem .
A.
contribute to solving
B.
contribute to solve
C.
be contributed to solve
D.
be contributed to solving
【简答题】曲柄滑块机构是曲柄摇杆机构中长度趋向无穷大时演变而来;不改变曲柄滑块机构中构件 _______ 的尺寸,只将其曲柄固定作为机架,就转化成为 机构。
【简答题】利用给定的素材,使用HTML、CSS、Javascript制作学校主页及分页
【单选题】Whatever we do should _____ the environment. [ ]
A.
contribute for protecting
B.
contribute to protect
C.
contribute to protecting
D.
contribute in protect
【简答题】Staying married is a challenge in modern society. What are some of the factors that contribute to this difficulty?
【单选题】I’m sure your suggestions will _____ the problem.
A.
contribute to solving
B.
contribute to solve
C.
be contributed to solve
D.
be contributed to solving
【单选题】What mostly contribute to modern Chinese youth’s independence and confidence?
A.
Improvement of their education and the fast development of Chinese economy.
B.
Improvement of their life quality and better care from their parents.
C.
Cultivation of good virtues and moralities.
D.
Acquirement of more skills.
【简答题】曲柄滑块机构是改变曲柄摇杆机构中的_____长度和形状而形成的。在曲柄滑块机构中改变_____ 转动副尺寸形成偏心轮机构。在曲柄滑块机构中以_____为机架而得到回转导杆机构。
相关题目：
参考解析：
知识点：
题目纠错 0
发布
