有一未完成的离子方程式:□□+ XO3-+6H+═3X2+3H2O,据此判断X元

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问题:

有一未完成的离子方程式:□□+ XO3-+6H+═3X2+3H2O,据此判断X元素的最高化合价为

A.+7

B.+6

C.+5

D.+1

考点:氧化还原反应的配平
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按工艺(过程)布置的生产系统具有柔性。()

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在调节阀调校过程中,不属于应该重点检查的控制阀元件是()。

A、控制阀的定位器

B、控制阀的出入口法兰面

C、控制阀的气源过滤器

D、控制阀的膜头

题型:选择题

When you stop and think about your high school or college alma mater, were your experiences more positive or negative Do your feelings of (1) in that school have anything to do with whether or not your school was single-sex or coed (2) to send their children to single-sex schools, because they feel both (3) when they study in the company of students of the same sex. They (4) .
For years, only parents who could afford to send their children to private schools, or who had (5) , chose single-sex education for their children. Single-sex schooling was (6) for most American families. Today, however, along with (7) , public schools are experimenting with the idea of (8) .
Girls may be the ones who benefit most from single-sex schooling. Studies have shown that (9) in coed classrooms because teachers sometimes pay more attention to boys. Girls’ (10) toward their studies tends to disappear as they begin to feel less successful. They start to (11) outperform them in math and science. As boys (12) , girls start to lose it. Moreover, adolescence is (13) for girls. As they experience adolescent changes, some girls become depressed, develop an addiction, or suffer from (14) .
In the early 1990s, some influential people said that being in single-sex classes could (15) . Schools across the country began creating single-sex classrooms and schools. But many critics claim that (16) may actually be detrimental to a girl’s education because they (17) of sex differences.
The renewed interest in single-sex schooling (18) among Americans. Those who give it full endorsement believe girls need an all-female environment to take risks and find their own voices. Those who (19) of single-sex schooling wonder whether students’ lack of achievement warrants returning to an educational system that divides the sexes. They believe there is no (20) .

题型:选择题

假设你是新华中学的高三学生李华,亚洲冬季运动会将在你居住的城市举办,你们学校招募志愿者。请根据以下要点给校长写一封自荐信。

爱好体育;2 英语好,擅长交际;3,乐于助人。

注意:1. 词数120左右;

信的开头和结尾已经给出,但不计入总词数;

可以适当增加细节,以使行文连贯。

Dear Headmaster,

I am more than excited to hear that the Asian Winter Games will be held in our city.__________________________________________________________________________

题型:选择题

红军长征途中召开的(),开始确立了毛 * * 在党中央和红军的领导地位,挽救了党、挽救了红军、挽救了中国革命,成为党的历史上一个生死攸关的转折点。

A、古田会议

B、遵义会议

C、黎平会议

D、两河口会议

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