皮皮学，免费搜题
登录
搜题
【单选题】
曲柄摇杆机构中,若曲柄为件,已知摇杆的行程速比系数K=1.5,那么极位夹角θ等于( )。A.
18°
B.
-18°
C.
36°
D.
72°
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
【简答题】周年庆活动!九折优惠。
【单选题】--- Remember the first time we ______ , Peterson? --- Of course, I ______ . We’ve been close friends ever since.
A.
met; do
B.
met; did
C.
had met; did
D.
have met; do
【单选题】听力原文：Now that we've addressed the small departmental problems we've been having, I'd like to move on to departmental changes. As you may know, Mark Gering and Luisa Ogilvy are being promoted to work a...
A.
A company executive
B.
A retiring employee
C.
A recently hired manager
D.
A recently promoted manager
相关题目：