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【多选题】
关于会计工作的社会监督,下列表述正确的有( )。
A.
会计工作的社会监督是一种外部监督,是单位内部监督的再监督
B.
会计工作的社会监督以其特有的中介性和公正性而得到法律认可,具有很强的权威性、公正性
C.
单位和个人检举违反《会计法》和国家统一的会计准则制度规定的行为,也属于会计工作社会监督的范畴
D.
会计工作的社会监督主要是指由注册会计师及其所在的会计师事务所依法对委托单位的经济活动进行审计、鉴证的一种外部监督
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【判断题】在计算蜗杆传动的啮合效率时,蜗杆和蜗轮齿面间的当量摩擦系数可根据两者的相对滑动速度选取
A.
正确
B.
错误
【简答题】一手动蜗杆传动起重装置如图4-6所示。已知该蜗杆传动的有关参数为:m=8mm,q=8,z 1 =1,z 2 =40;卷简直经D=200mm。试求: (1) 使重物上升1m手柄所转圈数n 1 ,并在图中标出手柄的转向; (2) 若蜗杆和蜗轮之间当量摩擦系数f v =0.2,求传动的啮合效率η 1 ,并说明该传动能否自锁? (3) 若起重量Q=10 4 N,人手推力P=200N,求手柄长度L; (4)...
【单选题】What is the woman going to do this Sunday afternoon?
A.
She is going to an exhibition abroad.
B.
She is going to a wedding ceremony.
C.
She is going on a voyage over the Pacific.
D.
She is going to an art museum.
【判断题】在计算蜗杆传动啮合效率时,蜗杆和蜗轮齿面间的当量摩擦系数可根据两者的相对滑动速度选取。
A.
正确
B.
错误
【单选题】“最古之史,实为方志”是 ______ 提出的。
A.
章学诚
B.
梁启超
C.
康有为
D.
毛泽东
【单选题】急性中毒患者,当诊断不明时,最应选择的洗胃液是
A.
1:15 000高锰酸钾
B.
温开水或生理盐水
C.
牛奶
D.
3%过氧化氢
E.
2%~4%碳酸氢钠
【简答题】This is a picture of Mr Wang’s family. The man in the middle is Mr Wang, the father. The woman is the mother. They have two daughters. One is Wang Fang. She is twelve. The other is Wang Li. She is thi...
【单选题】What is the woman trying to accomplish in this conversation?
A.
Convince the man that they should rest for a while.
B.
Teach the man about the types of clouds.
C.
Entertain the main with some interesting weather stories.
D.
Persuade the man to turn around and go down the hill.
【单选题】Man: Is the freeway always this deserted? Woman: It's the middle of the day. Everyone is at work. Question: What does the woman imply?
A.
The freeway isn't usually as empty as it is now.
B.
Many prefer to eat dessert in the middle of the day.
C.
The freeway isn't working in the middle of the day.
D.
Most people prefer to work at night.
【简答题】设某MPSK系统的比特率为4800b/s,并设基带信号采用 余弦滚降滤波器预处理,试问: (1)4PSK占用的信道带宽和频带利用率; (2)8PSK占用的信道带宽和频带利用率。
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