下列物质中,前者是氧化物后者是单质的是 A.铁粉 硫粉 B.水银氧化汞 C.二氧

题型:选择题

问题:

下列物质中,前者是氧化物后者是单质的是

A.铁粉 硫粉

B.水银氧化汞

C.二氧化碳氧气

D.水蒸气冰

考点:单质和化合物纯净物和混合物氧化物同素异形体
题型:选择题

从养生角度来看,目前,一般将地域分为()。

A、东部、中部和西部三大地带。

B、六大经济区。

C、八大经济区。

D、山地高原、平原盆地既海滨海岛等三部分。

题型:选择题

Research studies show that there are some fundamental (1) between men and women in their attitudes to (2) matters. Women are far more likely to save for their children’s (3) and to save up to buy a (4) . Men tend to save for a (5) , and for their (6) . But in fact the need for women to save for their old age is far (7) than for men. Throughout the world, women are likely to live many years (8) than men. Furthermore it is the (9) women who will most often have to look after the children and thus they need more (10) to look after not just themselves but others. Women today need to look ahead, think ahead, not wait until they’re under (11) .
A number of (12) have been set up to help them do this. Some educational institutions offer night (13) in Money (14) . They can be given (15) on different ways of saving. It is usually advised that at least (16) of a person’s savings should be in low-risk investments but for the rest, (17) advisors often advise taking some (18) risks. Initiatives such as this can give women the economic (19) and knowledge they need for a comfortable, (20) retirement.

题型:选择题

以下反应哪一项不是体内肝生物转化的反应类型()

A.结合反应

B.还原反应

C.水解反应

D.裂解反应

E.氧化反应

题型:选择题

贮存在短时记忆系统的信息主要是以()的方式存在的。

A.视觉编码

B.语音听觉编码

C.语义编码

D.语言中介编码

题型:选择题

在大斜度的井眼内,正常情况下,起钻载荷要比直井增加()。

A.10~30%

B.20~30%

C.30~50%

D.80~100%

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