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【简答题】
如图，一个3:4:5的斜面固连在一转盘上，一木块静止在斜面上，木块离转盘中心的水平距离为40cm，斜面和木块之间的摩擦系数μ = 0.25. 若使此木块保持相对转盘不动，转动角速度的最小值为 rad/s（结果保留一位小数）【图片】
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举一反三
【单选题】Do your best to remember other people's names and interests, which shows you ________ them.
A.
look up to
B.
worry about
C.
care about
D.
look after
【单选题】Perhaps you ________ stop playing computer games now. Your boss may be turning up in the office at any moment.
A.
will
B.
must
C.
should
D.
can
【单选题】妊娠合并心脏病的孕产妇需输液时.输液速度应为( )
A.
10一20滴/min
B.
20一30滴/min
C.
30一40滴/min
D.
40一50滴/min
E.
50一60滴/min
【单选题】Your boss shows up late to a meeting that is about to conclude. You should:
A.
Thank her for stopping by; politely interrupt the person speaking at the meeting and debrief your boss on the agenda
B.
Slightly nod when she enters but continue with the meeting without bringing her up to speed
C.
Once the session is over, tell her that it is bad practice to show up late for meetings
D.
Openly criticize your boss about being tardy upon her arrival
相关题目：
【单选题】妊娠合并心脏病的孕产妇需输液时.输液速度应为( )
A.
10一20滴/min
B.
20一30滴/min
C.
30一40滴/min
D.
40一50滴/min
E.
50一60滴/min