皮皮学，免费搜题
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【单选题】
花药发育过程中,单核花粉即小孢子形成的过程是( )。A.
造孢细胞－孢原细胞－花粉母细胞－小孢子
B.
花粉母细胞－孢原细胞－造孢细胞－小孢子
C.
孢原细胞－花粉母细胞－造孢细胞－小孢子
D.
孢原细胞－造孢细胞－花粉母细胞－小孢子
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皮皮学刷刷变学霸
举一反三
【判断题】The personal information at the very beginning is all about the person who wants an LAN to be installed at his building. (Reading B)
A.
正确
B.
错误
【单选题】When no modification has taken place,the information at the receiver is identical to the one at the sender before the ____ step.
A.
post-processing
B.
preprocessing
C.
processing
D.
first
【单选题】People ____ that vertical flight transports would carry millions of passengers as do the airliners of today.
A.
convinced
B.
resolved
C.
assured
D.
anticipated
【单选题】A type of vertical transport equipment that moves people or goods between floors (levels, decks) of a building.
A.
elevator
B.
trunk
C.
boot
D.
rack
【判断题】The personal information at the very beginning is all about the person who wants an LAN to be installed at his building.
A.
正确
B.
错误
【单选题】A computer virus plagues other computers by ______.
A.
misguiding the header information at the beginning of the file
B.
preying on other computer files
C.
attaching its infected code to the end of a host program
D.
all of the above
【简答题】什么是布尔逻辑检索?有哪些常用算符,在检索中各自发挥什么作用?
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