鉴别下列各组物质的两种方法或选择的试剂均正确的是 [ ] A.A B.B C.C

题型:选择题

问题:

鉴别下列各组物质的两种方法或选择的试剂均正确的是

[ ]

A.A

B.B

C.C

D.D

考点:物质的鉴别金属的化学性质碳的性质盐的性质
题型:选择题
下列注音完全正确的一项是
[ ]
A.公输盘(qū)胡不(jiàn)我于王
B.邻有( bì)舆而欲窃之子墨子之守(yù)有余
C.(xiāng)为身死而不受(zēng)益其所不能
D.人则无法家( bì)士故患有所不(pì)也
题型:选择题

海关大钟的分针长1.2米,时针长0.9米,分别计算一小时分针与时针针尖运动的路程.

题型:选择题

把生石灰、二氧化碳、食盐分别溶于水,往它们的溶液里分别滴入紫色石蕊试液,溶液呈现的颜色依次是(  )

A.蓝色、红色、紫色

B.红色、无色、蓝色

C.无色、蓝色、紫色

D.紫色、蓝色、红色

题型:选择题

在项目前期的各项工作中,初步可行性研究主要研究的是( )。

A.投资环境分析

B.市场需求分析

C.项目宏观必要性

D.全面深入研究

E.主要建设条件

题型:选择题

When foreigners are sometimes asked what seems most strange about American society, somewhere on the top of the list will be the fact the average citizen is allowed to possess guns.
Although it is true that many people carry guns legally in the United States, it is also known that many who possess guns carry illegally. Others, who don’t have guns, feel that guns can be acquired quite easily. A recent survey indicated that many high school students, especially in the inner cities, can acquire gun with little difficulty.
Although most people would never want to own a gun, others have taken up hunting as a sport and enjoy hunting wild game in season. Hunting for deer and duck in fall and winter is very much a part of the American culture.
Also, some farmers in rural areas who raise cattle and sheep feel they need to protect their animals against wolves that attack their herds and flocks at night. To defend and support their fights to possess firearms the National Rifle Association (NRA) was founded in 1871. The main importance of this organization has been its efforts to prevent strict gun control legislation. The NRA has great political support in small towns and rural areas, especially in the West and the South, where hunting is especially popular. Those who favor the fight to possess guns insist that the Constitution provides the right of people "to keep and bear arms". They believe that gun control laws will not solve the problem of crime and violence in America.
Recent events in America, however, have shown that the question of gun possession is now out of control and p voices have called for immediate action to be taken. In seemingly peaceful schools students have gone into classrooms and opened fire upon their classmates. America has been shocked by such incidents which seem to occur with greater frequency. The periodic deaths of innocent citizens and even foreign visitors from guns have forced legislators to pass laws to stop these senseless killings.
The day may not be far off when America will be transformed from a gun culture to one which controls their use and possession.

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