皮皮学，免费搜题
登录
搜题
【判断题】
铰链四杆机构的压力角是指在不计摩擦情况下连杆作用于从动件上的力与该力作用点速度间所夹锐角。A.
正确
B.
错误
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】Which of the following points to the humanitarian crisis in Sudan?
A.
UN aid workers are working in the country.
B.
Several refugee camps have been established.
C.
Refugees face hunger, epidemics and continued attacks in camps in Darfur.
D.
Some 4, 000 refugees had been moved by Sudanese authorities.
【单选题】A UN official said aid programs will be ( ) until there is adequate protection for relief personnel.
A.
multiplied
B.
spanned
C.
arrested
D.
suspended
【单选题】百合科重楼属植物全世界有24种,主要分布于不丹、印度、尼泊尔和越南等国,中国有19种,分布于湖南、云南、四川、陕西、贵州等省区,常生于海拔 的阔叶林下阴湿地。
A.
2900～3000m
B.
3000～3200m
C.
3000～3500m
D.
700～3000m
【单选题】Other aid workers drove a vehicle _________ a television and video recorder to local villages.
A.
with
B.
by
C.
of
D.
about
【单选题】A UN official said aid programs will be ( ) until there is adequate protection for personnel. A multiplied
B.
spanned
C.
arrested
D.
suspended
相关题目：