皮皮学，免费搜题
登录
搜题
【简答题】
游标卡尺测量工件时应怎样读数 ?
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】60Si2MnA is a kind of ( ), its Si content is ( ), its Mn content is ( )
A.
alloy structural steel or alloy spring steel, <2%, <1%
B.
high strength low alloy steel, <2%, <1%
C.
alloy structural steel or alloy spring steel, between 1.5% and 2.49%, <1.5%< /div>
D.
high strength low alloy steel, between 1.5% and 2.49%, <1.5%< /div>
【单选题】Constant smiling without apparent reason ______.
A.
is a sign of one's friendliness
B.
is a sign of one's unfriendliness
C.
makes people feel happy
D.
makes people feel uncomfortable
【简答题】镜头有哪些基本构成?分别起到的什么作用?
【单选题】SI is a ______________ demanding task because many processes need to take place at one and the same moment in time.
A.
cognitively
B.
analytically
C.
systematically
D.
methodically
【判断题】When a photon breaks a Si-Si bond, a free electron and a hole in the Si-Si bond is created. The result is the photogeneration of an electron and a hole pair (EHP)
A.
正确
B.
错误
【单选题】Si is organizing
A.
a special team to protect the environment
B.
a meeting to discuss the problem of pollution
C.
an event named “Environment Day”
相关题目：
【单选题】60Si2MnA is a kind of ( ), its Si content is ( ), its Mn content is ( )
A.
alloy structural steel or alloy spring steel, <2%, <1%
B.
high strength low alloy steel, <2%, <1%
C.
alloy structural steel or alloy spring steel, between 1.5% and 2.49%, <1.5%< /div>
D.
high strength low alloy steel, between 1.5% and 2.49%, <1.5%< /div>