皮皮学,免费搜题
登录
搜题
【多选题】
以下关于贝氏体的描述正确的是
A.
下贝氏体中的碳化物沿着铁素体长轴成一定角度平行排列
B.
下贝氏体中铁素体过饱和碳含量低于上贝氏体
C.
随转变温度降低,上贝氏体中铁素体条变薄,渗碳体细化
D.
随含碳量增加,上贝氏体中铁素体条减少,渗碳体变粗大
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】The last sentence 'This curious fact...' leads us to conclude that ______.
A.
thunderstorms break out over a lake
B.
thunderstorms have something to do with the heat from the sun
C.
thunderstorms are often seen in winter, too
D.
thunderstorms have never happened in dark materials
【单选题】More thunderstorms ______ in summer than any other time of the year.
A.
happened
B.
have happened
C.
happen
D.
will happen
【简答题】芳香酮类化合物C=O伸缩振动频率向低波数位移的原因为( )
【单选题】关于反馈调节不正确的是()
A.
负反馈是反馈信号能减低受控部分的活动
B.
负反馈的主要意义是维持机体内环境的稳态
C.
正反馈的主要意义是维持机体内环境的稳态
D.
正反馈的主要意义是是某一生理过程一旦开始迅速加强直到完成
E.
血液凝固属于正反馈调节
【多选题】某律师接受当事人委托参加民事诉讼,以下属于委托代理权消灭的原因有( )。
A.
诉讼终结
B.
当事人解除委托
C.
代理人辞去委托
D.
委托代理人死亡
E.
委托代理人有过错
【判断题】绿色软件可以分为狭义和广义两种,其中狭义的绿色软件在删除时,只要直接删除软件所在的文件夹即可,是最理想的绿色软件。
A.
正确
B.
错误
【单选题】听力原文: Thunderstorms are the least dangerous and least violent of all the storms. Almost everyone has experienced a thunderstorm with its heavy rains, high winds, lightning and accompanying thunder. Th...
A.
Equivalent to a hydrogen bomb.
B.
Equivalent to tons of TNT.
C.
Equivalent to tons of hydrogen bombs.
D.
Equivalent to a ton of TNT.
【单选题】Ted and his friends established a website offering useful information about thunderstorms ______ similar accidents happening.
A.
prevent
B.
preventing
C.
to prevent
D.
prevented
【多选题】Thunderstorms are expected in _______
A.
Hong Kong
B.
Kuala
C.
Bangkok
D.
Mumbai
【单选题】Thunderstorms have struck northern China, ______ heavy rain and ______ traffic chaos.
A.
brought, caused
B.
bringing, causing
C.
having brought, having caused
D.
to bring, to cause
相关题目: