皮皮学，免费搜题
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【单选题】
下列哪一项不是以太网的主要技术特征A.
双绞线缆和光纤作为主要传输媒体
B.
交换技术
C.
VLAN技术
D.
高速
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】下列有关蛋白质α-螺旋的叙述，正确的是( )。
A.
属于蛋白质的三级结构
B.
由二硫键构成，起稳定作用
C.
由盐键构成，起稳定作用
D.
多为右手螺旋，3．6个氨基酸残基升高一圈
【简答题】符号表的组织方式中间接方式是指单独设置一个字符串数组,其中存放所有标识符,在符号表的名字栏中设置两项内容:()和();
【单选题】An argue of the software firms for the security problems is that
A.
software's performance depends on many factors.
B.
information is stolen by hackers.
C.
there is no law to control the software industry.
D.
software's quality decreases by the threat of sweat.
【单选题】A firewall is a (1) ystem designed to (2) n organization's network against threats.
A.
operating
B.
programming
C.
security
D.
service
【单选题】It's one thing... but something else entirely if it winds up on your dinner plate.
A.
appears in the end
B.
annoys
C.
blows away
D.
moves upwards
【简答题】Time to Dance Are you the kind of person who likes to move with music? It's a natural thing to do. Even little children start jumping up and down when they hear music. Scientists say that animals danc...
【单选题】Will Quality Eat up the U.S. Lead in Software? If U. S. software companies don't pay more attention to quality．they could kiss their business good-bye. Both India and Brazil are developing a world-cla...
A.
Germany.
B.
The U．S.
C.
Brazil
D.
India
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