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【单选题】
救生艇抢滩登陆时,可选择一个比较强壮的人员拉一根连接救生艇的绳索从艇上游到,在选择固定物拴住绳子的末端,然后艇上所有人员一起拉着绳子,直到登陆成功。 ( )
A.
B.
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举一反三
【单选题】设逻辑变量X为True,Y、Z均为False,以下逻辑表达式值为True的是()。
A.
XOR(YANDZ)
B.
(XANDY)ORZ
C.
(NOTX)ORYORZ
D.
XAND(YORZ)
【简答题】阅读理解 As they migrate (迁徙), butterflies and moths choose the winds they want to fly with, and they change their body positions if they start floating in the wrong direction. This new finding suggests t...
【单选题】Are they catching butterflies? [     ]
A.
No, they aren't.
B.
Yes, they do.
C.
Yes, he is.
【单选题】当毛坯出现形状歪斜,偏心、各部分壁厚不均匀等缺陷时,可以通过划线借料的方法,使各加工面的()合理分配,互相借用,从而保证零件加工。
A.
加工用量
B.
加工余量
C.
切削用量
D.
切削力
【单选题】在B2C电子商务模式中,参与主体不包含( )
A.
监管局 网上商家消费者 CA认证机构
B.
网上商家
C.
消费者
D.
CA中心
【简答题】Butterflies are some of the most fascinating and beautiful insects in the world. butterflies will live about 2 to 4 weeks. They use their senses of sight, touch, hearing, smell, and taste to sur...
【简答题】设逻辑变量A、B均为True,C、D均为False,以下逻辑运算表达式值为假的有()。 A)(AANDB)OR(CANDD) B)NOT(AANDB)OR(CANDD) C)(AORB)AND(CORA) D)(AORB)OR(NOT())
【单选题】设逻辑变量X为True,Y、Z均为False,以下逻辑表达式值为True的是______
A.
X  or  (Y and Z)
B.
(X and Y) or Z
C.
(not X) or Y or Z
D.
X and (Y or Z)
【单选题】设逻辑变量X为False,Y、Z均为True,以下逻辑表达式值为False的是______。
A.
X or (Y and Z)
B.
(X and Y) or Z
C.
(not X) or Y or Z
D.
X and (Y or Z)
【单选题】What can be inferred about monarch butterflies?
A.
They are the most common butterflies in North America.
B.
Their population has been reduced because of herbicides.
C.
They have lived on earth for several million years.
D.
Their diets consists mainly of other butterflies.
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