皮皮学，免费搜题
登录
搜题
【简答题】
Lucy is a student in Class Two , Grade Seven . She is eleven years old . She had a beautiful toothbrush（牙刷）. But it was broken last Sunday . She was very sad because not only it was beautiful ,but also it was blue --- her favorite color . So her mother went shopping with her to buy a toothbrush on Sunday afternoon . There are many toothbrushes in the shop . They bought a blue one . There is a blue bird in it . And it is made in Guangzhou . It’s ten yuan . It’s expensive . But it is so beautiful . And she likes it very much . Then they went home . Lucy can brush teeth now . How happy she is ! 根据短文内容从A、B、C、D四个选项中选出正确的答案。 小题1:How old is Lucy ? A．8 B．9 C．10 D．11 小题2:What color was Lucy’s old toothbrush ? A．Red B．Green C．Yellow D．Blue 小题3:Who went to buy a toothbrush with her on Sunday afternoon ? A．Her mother . B．Her father C．Her friend D．Herself 小题4:Where is Lucy’s toothbrush from ? A．The US B．China C．Japan D．Singapore 小题5:Which sentence has the same meaning as the underline one ? A．I can’t mind it B．I can’t afford it C．It’s good D．It’s not cheap
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】空心圆截面杆两端受外力偶矩m作用发生扭转,现分别采用 (a) 和(b) 两种横截面,已知 (a)截面 α 2 a = (d 1 /D 1 ) 2 =0.8,(b) 截面 α 2 b = (d 2 /D 2 ) 2 =0.6而横截面积A a =A b ,则它们的最大剪应力关系是( )。
A.
B.
τ a ≈τ b
C.
τ b > τ a
D.
τ a > τ b
【简答题】定向扩散路由机制可以分为三个阶段兴趣扩散阶段、__________和__________.
【单选题】空心圆截面杆两端受外力偶矩 M e 作用发生扭转,现分别采用两种不同的横截面,已知横截面 a 的内外径之比为 α a 2 =( d a / D a ) 2 =0.8 ,横截面 b 的内外径之比为 α b 2 =(d b /D b ) 2 =0.6 ,而横截面面积 A a = A b ,则两种横截面上的最大切应力的关系有四种答案,其中正确的是
A.
τ a = τ b
B.
τ a ≈ τ b
C.
τ a < τ b
D.
τ a > τ b
【简答题】定向扩散路由机制可以分为三个阶段兴趣扩散阶段、__________和__________.
【简答题】定向扩散路由机制可以分为三个阶段兴趣扩散阶段、__________和__________.
【简答题】定向扩散路由机制可以分为三个阶段兴趣扩散阶段、__________和__________.
【简答题】堆栈以( )的方式存储数据,若操作数存放在堆栈中,则称为堆栈寻址。堆栈有( )和存储器堆栈。无论哪种类型的堆栈,数据的存取都在( )进行,通常用 SP 来表示栈顶指针。
【简答题】定向扩散路由机制可以分为三个阶段: 、 、路径加强。
相关题目：