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【单选题】
下列有关地貌成因的叙述，错误的是 [ ]A.
黄土高原的黄土是由风力挟带的粉砂、尘土堆积而成的
B.
长江三峡是冰川侵蚀形成的
C.
内蒙古高原西部的大片戈壁和裸岩荒漠是风力作用的产物
D.
塔克拉玛干沙漠中的沙丘和沙垄是典型的地貌
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皮皮学刷刷变学霸
举一反三
【简答题】根据给出的短语，写出中文意思：electronic mail
【单选题】Electronic mail has become an extremely important and popular means of communication. The convenience and efficiency of electronic mail are threatened by the extremely rapid growth in the volume of un...
A.
heavy e-mail traffic
B.
fraudulent e-mail messages
C.
large volume of messages
D.
increasing amount of unwanted e-mail
【单选题】Electronic mail wasn't successful in the past because _________.
A.
the cost of electronic mail services was very high
B.
personal computers weren't widely used
C.
its users subscribed to different, unconnected mail services
D.
computer networks could not be connected globally
【多选题】下列属于电缆优点的是()。
A.
对人身比较安全， 供电可靠性高
B.
电缆的电感较大，有利于提高电力系统的功率因数
C.
地下隐蔽工程，美观， 基本上不占用地面空间
D.
同一地下电缆通道，可容纳多回线路
【简答题】电力电缆的电容大，有利于提高电力系统的（）。
【简答题】删除AdventureWorks数据库中的testldat4文件。
【单选题】Electronic mail has become an extremely important and popular means of communication. The convenience and efficiency of electronic mail are threatened by the extremely rapid growth in the volume of un...
A.
heavy e-mail traffic
B.
fraudulent e-mail messages
C.
large volume of messages
D.
increasing amount of unwanted e-mail
【简答题】Electronic mail，or E-mail，is a method of transmitting message through a computer network. Business communication by E-mail is basically the same as writing on paper. Although E-mail tends to be a more...
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