题目内容

简述超声波法检测混凝土强度的基本原理和检测步骤。

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At around age of five, every child has to make the (67) from home to school. Children at this age have an enormous amount to (68) . Their response to rules, regulations and manners--all (69) related to boundaries--is (70) great importance. How they react to "no" will have a major (71) on their capacity to settle, to make friends and to learn at school. After they start school, children are (72) with rules. There is both a need and a reluctance to (73) them. Children will ask constantly “Am I allowed to… ”often to the (74) of- their parents, who feel that they ought to know (75) that, for instance, they do not need to ask to go to the toilet at home. It is (76) they ask because they need to feel that they have permission, that they fire (77) a rule. It is a request for (78) . It is also a way of managing the two different (79) of home and school, (80) what they can do where. Many a mother gets called by the teacher’s name and vice versa. During the school day, children have to listen to their teachers, to follow more rules than there are at home and to (81) with the group. They may be successful at this and come home (82) very independent and rightly proud of their (83) . If this is not recognised at home and they are treated (84) they were before, they will feel as if their "growing up", still very precarious (不稳定的) , is diminished. So they will often (85) . "Don’ t treat me like a baby" is a (86) requently heard in the primary school years.

A. in that
B. as if
C. even though
D. as long as

请概括“给定资料”所反映的当前教育不公平的主要表现。要求：语言精练，层次要点清楚，字数不超过200字。

党的十三大系统地阐明了关于社会主义初级阶段的理论，明确概括了党在社会主义初级阶段的基本路线。

A. 对
B. 错

Almost 20,000 whales have been slaughtered since a (36) on commercial whaling was introduced in 1986 and the death (37) is rising each year. Norway and Japan killed over 1,000 whales in 1999 and they plan to kill even more. As the (38) concerns increase, whaling is no longer the issue as it was or (39) to be. With little public awareness of the increasing whale slaughter, there has been no pressure to stop it. (40) , the political will confront the whalers and (41) the whaling ban has (42) away. Commercial whaling has (43) whale population worldwide, (44) .There is still great scientific uncertainty about the size and status of remaining whale populations. (45) . They need to be protected, not hunted. (46) .