皮皮学，免费搜题
登录
搜题
【单选题】
在投影面垂直线中,垂直于W投影面的直线称为A.
正垂线
B.
铅垂线
C.
侧垂线
D.
水平线
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】---Don’t you usually go to work by bus? --- ________, but sometimes I go to work on foot.
A.
No, I don’t
B.
Yes, I don’t
C.
No, I do
D.
Yes, I do
【单选题】The officer of the watch should use radar when appropriate and at all times in ______ waters.
A.
congesting
B.
congested
C.
congestion
D.
Congest
【单选题】The officer in charge of the navigational watch shall notify the master immediately _____. 1 if good visibility is encountered or expected 2 if difficulty is experienced in maintaining course 3 if the...
A.
①②
B.
①③
C.
①②③
D.
②③
相关题目：