Elephants are perhaps the only animals that are hunted for their teeth. Elephant tusks, or very large teeth growing on either side of their mouths, are composed of a valuable material called ivory(象牙).
An elephant uses its long, pointed tusks as tools for digging in the ground for food. He also uses them as weapons in combat.The tusks of male elephants are usually large and heavy. In Africa, female elephants have long, light tusks. In India and other parts of southern Asia, female elephants have small, short tusks or none at all.Tusks in good condition are in great demand, and may sell for as high as two thousand dollars or more. Because of this, large numbers of elephants have been killed. Some countries have initiated (开始) methods to protect elephants. They have established elephant preserves, areas of land set aside for herds of elephants where no one is allowed to harm them. Elephants on the preserves are safe from ivory hunters.
A.绝缘橡胶板
B.B.瓷砖
C.C.地毯
D.D.工作自流坪
Americans often say that there are only two things a person can be sure of in life: death and tax es. Many people feel that the United States has the worst taxes in the world.
Taxes are the money that people pay to support their government. There are generally three levels of government in the United States: federal, states, and city; therefore, there are three types of taxes.
Salaried people who earn more than four thousand dollars per year must pay a certain part of their salaries to the federal government, and the money is used to fund state workforce agencies. The percentage varies for different people. It depends on their salaries. The federal government has two level income tax: that is, 15 or 28 percent.＄17,850 is the cut off. The tax rate is 15 percent below＄17,850 and 28 percent above.
The second tax is for the state government: New York, California, or any of the other fortyeight states, including income tax and sales tax. Some states h
A. $11,200.
B. $6,000.
C. $17,850.
D. $5,000.
| Happiness is (21)
everyone looks for. Maybe someone says that he is (22)
. However, what makes him happy may not (23) for
Others. And even worse, someone may spend all his (24)
looking for happiness, but in vain(徒然). In the past, I tried my best to (25) myself happy. I thought if I could freely get and do what I wanted to, I (26) be happy. Certainly, it was possible but I was (27) Though I could be happy at times, I couldn’t keep my happiness for a long time. Why One day, when I told a friend of mine what I (28) about happiness, he smiled and said only a few words, "Happiness is not a single thing but a by- product(副产品)." I was surprised, but he was really (29) Someone thinks money can (30) everything, but when he become A. yet B. or C. but D. and [单项选择]属于细胞凋亡主要信号通路中死亡受体途径的是（）。
A. caspase-9 B. TNFR C. VEGFR D. EGFR E. MAPK [多选题]降低通风阻力的措施有()。(1.0分)
A.降低摩擦阻力系数 B.扩大巷道断面 C.选择巷道周长与断面积比较小的巷道形状 D.缩短巷道的长度 [单选题]双轨式钢轨超声波探伤仪应保证在最高持续检测速度下，每个探头（晶片）超声脉冲发射距离间隔不大于（ ）米。
A.2 B.3 C.4 D.5 [单项选择]
Almost exactly a year ago, in a small village in Northern India, Andrea Milliner was bitten on the leg by a dog. "It must have (1) your nice white flesh", joked the doctor (2) he dressed the wound. Andrea and her husband Nigel were determined not to let it (3) their holiday, and thought no more (4) the dog, which had meanwhile quietly disappeared (5) the village. [填空题]素质教育是面尚全体学生，促进学生全面发展的教育，它以培养学 生 _为重点。
[多项选择]电压互感器出现回路断线，警铃发出响声，电压表指示为0，造成电压互感器回路断线的原因可能有（）。
A. 回路接头松动或断线 B. 高压熔断器熔断 C. 低压熔断器熔断 D. 电压切换开关接触不良E、电压切换回路触点接触不良 [单项选择]被告人有权获得辩护是我国《刑事诉讼法》的一项基本原则，下列关于辩护的说法中，正确的是( )。
A. 在侦查阶段，犯罪嫌疑人可以聘请律师为其辩护 B. 在审查起诉阶段，人民检察院应当为未成年人指定辩护人 C. 在审查起诉阶段，犯罪嫌疑人只能自行辩护，不得委托辩护人为其辩护 D. 在审判阶段，被告人可以自行辩护也可以聘请辩护人辩护 [单选题]高程测量按所使用的仪器和施测方法不同分类中,最准确也是最普遍使用的是( )。
A.水准测量 B.三角高程测量 C.气压高程测量 D.A、B、C都可以 [单项选择]我国实行对外开放必须以( )为基础和前提。
A. 利益均等 B. 利益最大化 C. 垄断市场 D. 自力更生 [单项选择]有机磷农药中毒不用油类泻药是因为
A. 可致肠痉挛 B. 可致幽门梗阻 C. 有机磷溶于油更易吸收 D. 减少腹泻速度 E. 减轻腹痛 我来回答: 提交
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