信息在短时记忆中一般只保持()秒钟。 A.1~2 B.20~40 C.60~70 D

题型:单项选择题

问题:

信息在短时记忆中一般只保持()秒钟。

A.1~2

B.20~40

C.60~70

D.70~80

考点:中学化学(高级)高级中学化学考前冲刺高级中学化学考前冲刺题库
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一个长方体的棱长和是48厘米,长、宽、高的比是3﹕2﹕1,这个长方体的体积是______立方厘米,底面积是______平方厘米.

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从小鼠的一种有荚膜的致病性肺炎球菌中提取出的DNA,可使另一种无荚膜、不具有致病性的肺炎球菌转变为有荚膜并具致病性的肺炎球菌,而蛋白质、RNA无此作用,由此,可以证明()

A.DNA是遗传物质

B.蛋白质和RNA是遗传物质

C.蛋白质是遗传物质

D.RNA是遗传物质

E.DNA和蛋白质是遗传物质

题型:单项选择题

Kofi Annan says helping survivors of last week’’s earthquake and (1)________in the Indian Ocean is (2)________. The United Nations secretary-general says countries that have offered aid must (3)________and provide it. The offers add up to around (4)________dollars. United Nations officials say (5) ________of that is needed during the next six months.The concern about offers of international aid is (6)________. For example, the earthquake in Bam, Iran, in (7)________of 2003 killed more than (8) ________people. Countries and groups offered hundreds of millions of dollars (9) ________. The United Nations says it has (10)________only about (11)________dollars in aid received so far. Governments and organizations that offered help (12) ________that, however.On (13)________Mr. Annan met with world leaders in Jakarta, Indonesia to discuss aid for (14)________. The leaders discussed and (15)________the idea of (16)________owed by affected nations. But the leaders did not say they would do so. Some said that (17)________to survivors would be more helpful.Representatives of (18)________countries and international organizations attended the meeting in Jakarta. Officials say they will cooperate to develop (19)________ for the Indian Ocean and the (20)________.

题型:单项选择题

肩关节周围炎主要症状不包括()。

A.肩关节疼痛

B.关节活动障碍

C.夜间疼痛为著

D.病程长者三角肌萎缩

E.肩关节疼痛进行性加重

题型:单项选择题

生产经营或者使用新资源食品的单位或者个人,在产品首次上市前应当报( )审核批准。

A.卫生部

B.国家质量监督检验检疫总局认证认可监督管理委员会

C.国家食品药品监督管理局

D.省卫生厅

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