H—H键的键能是436 kJ·mol -1,I—I键的键能是151 kJ·mol

题型:选择题

问题:

H—H键的键能是436 kJ·mol -1,I—I键的键能是151 kJ·mol -1,H—I键的键能是299 kJ·mol -1。则对反应H2(g)+I2(g) 2HI(g)的说法,不正确的是         (   )

A.吸热反应

B.放热反应

C.化合反应

D.可逆反应

考点:能量的相互转化
题型:选择题

以下与《海洋环境保护法》中有关入海排污口设置的规定不符的是( )。

A.在海洋自然保护区、重要渔业水域、海滨风景名胜区和其他需要特别保护的区域,不得新建排污口

B.入海排污口位置的选择,应当经科学论证后,报设区的市级以上人民政府环境保护行政主管部门审查批准

C.环境保护行政主管部门在批准设置入海排污口之前,必须征求海洋、海事、渔业行政主管部门和军队环境保护部门的意见

D.新建排污口必须深海设置,实行离岸排放

题型:选择题

位于山东聊城的山陕会馆是山西、陕西商人接洽商务、汇兑、装卸货物,唱戏酬神的活动场所,为商人提供了极为便利的条件。根据所学判断山陕会馆最早建于

A.秦汉

B.隋唐

C.宋元

D.明清

题型:选择题

把高级语言编写的源程序变成目标程序,需要经过

A.汇编

B.解释

C.编译

D.编辑

题型:选择题

北京巨象工程公司为提高竞争优势,从日本订购进口成套装卸设备。该设备投入使用后,接连发生非正常技术性故障,经合法检验机构检验,确认为该设备中部分关键件品质不良。境内外交易双方协商决定,对该套改作削价30%的处理,并由境外供货商免费补偿进口部分关键件。
根据上述材料,回答下列问题:

补偿进口关键件在办理进口手续时,除报关单以外,还需提交的单证有( )。

A.商检证书

B.索赔协议

C.原进口设备的税款缴纳凭证

D.原进口设备的报关单

题型:选择题


The United States counts its population every ten years, and each census reveals that the racial and ethnic mix is changing dramatically, so by the year 2050, the "average" American will not be descended from (1) , but the majority of U. S. residents will trace (2) ancestry to Africa, Asia, the Hispanic world, the Pacific Islands, or the Middle East. Once the United States was a microcosm of European nationalities, (3) the United States is a microcosm of the world. The United States is (4) considered a "melting pot" society by many of its residents. (5) , many people prefer the term "salad bowl." They use this (6) to describe American society. American society will soon be (7) nonwhite. "Melting pot" implies that the different ethnic groups blend together (8) one homogeneous (9) , "salad bowl" (10) that nationalities, like the ingredients in a mixed green salad, retain their cultural (11) . Earlier generations of (12) believed they had to learn English quickly not only to survive but also for (13) .
Now, many immigrant groups do not (14) the same need. Because there are many places in America (15) you can work, shop, get medical care, marry, divorce and die without knowing English. (16) , Chinatown in San Francisco and New York. Also, Los Angeles has many Vietnamese immigrants and immigrants from Mexico. (17) , many immigrant groups want their children to know their (18) culture. Many Hispanics, for instance, want their children to learn (19) English and Spanish and study the Spanish language in school. They are fighting for the (20) to bilingual education in many communities. In many communities they are in the majority.

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