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【判断题】
平面机构自由度的计算公式F=3n-(2p l +p h )中的n是指机构中的构件数目
A.
正确
B.
错误
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【单选题】It's easy ______ a banana milk shake. Let me help you. [     ]
A.
do
B.
to do
C.
make
D.
to make
【单选题】— ().— Yes, where is ladies’ room please?
A.
I can help you.
B.
Let me help you.
C.
May I help you?
D.
What can I do for you?
【多选题】某电路的传输特性曲线如图所示,则其门限电压为( )。【图片】
A.
3
B.
6
C.
-3
D.
-6
【多选题】导流泄水建筑物包括( )等临时建筑物和部分利用的永久泄水建筑物。
A.
围堰
B.
导流明渠
C.
导流隧洞
D.
导流涵管
E.
导流底孔
【多选题】TTL门电路的电压传输特性曲性反映了数字电路的哪些技术参数?
A.
标准高低逻辑电平
B.
开门电平和关门电平 、
C.
阈值电压
D.
输入信号噪声容限
【多选题】泄水建筑物包括
A.
溢流坝
B.
河岸式溢洪道
C.
泄水深孔
D.
泄槽
【单选题】It's easy ______ a banana shake. Let me help you. [     ]
A.
do
B.
to do
C.
make
D.
to make
【简答题】FA: Exercise me, madam. Please ( 1 ) your seat belt, ( 2 ) your tray table and return your seat back to the upright position PAX: But the seat belt is too tight for me. FA: Let me help you. Y...
【单选题】Let me help you. Do you need an ( ) blanket?
A.
added
B.
extra
C.
full
D.
other
【单选题】Mum, you have got so ( )housework to do. Let me help you.
A.
many
B.
much
C.
little
D.
few
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