数控机床按伺服系统控制方式分类()、()、()。

题型:填空题

问题:

数控机床按伺服系统控制方式分类()、()、()。

考点:机电设备评估基础第三章金属切削机床第三章金属切削机床题库
题型:填空题

下列物质中既有氧化性又有还原性的是

A.HClO

B.Na

C. SiO2

D.N2O5

题型:填空题

细胞的结构包括()

A.细胞膜

B.细胞质

C.细胞核

D.以上均是

E.以上均不是

题型:填空题

收寄寄往台湾的(),按照寄香港、澳门的资费标准收费。

A、特快专递邮件 

B、函件 

C、包件 

D、邮件

题型:填空题

剂量不相关的药品不良反应是()

A.A型药品不良反应

B.B型药品不良反应

C.C型药品不良反应

D.D型药品不良反应

E.E型药品不良反应

题型:填空题

It has been argued by some that gifted children should be grouped in special classes. The (31) has been on the belief that in regular classes these children are held back in their intellectual (智力的) growth by learning situation that has designed for the (32) children.

There can be little doubt that (33) classes can help the gifted children to graduate earlier and take their place in life sooner. However, to take these (34) out of the regular classes may create serious problems.

I observed a number of intelligent children who were taken out of a special class and placed in a regular class. In the special class, they showed little ability to use their own judgment, relying (35) on their teachers’ directions. In the regular class, having no worry about keeping up, they began to reflect voluntarily on many problems, some of which were not on the school program.

Many are concerned that gifted children become (36) and lose interest in learning. However, this (37) is more often from parents and teachers than from students, and some of these (38) simply conclude that special classes should be set up for those who are (39) . Some top students do feel bored in class, but why they (40) so goes far beyond the work they have in school. Studies have shown that to be bored is to be anxious. The gifted child whop is bored is an anxious child.

33()

A.regular 

B.special 

C.small 

D.creative

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