On Sunday, April 22, 1990, people all over the world celebrated the same holiday. It was the twentieth anniversary of Earth Day. The purpose of the holiday, which we celebrate every year on that date, is to help people learn how to protect the planet Earth. People around the world celebrate Earth Day because they worry about the planet. Many forms of animal life are disappearing from the earth. Carelessness and accidents in many countries have caused problems that are harmful to the environment. Air and water pollution, oil spills, and toxic waste are some of the serious problems.
In fact, protecting the earth is truly a worldwide issue. Pollution in one place often affects areas far away. For example, an accident in a nuclear power plant in one country can create a radioactive cloud that goes halfway around the world. Factory smoke in one country can cause acid rain in another. It is easy to see how our protecting the environment has become an international issue.
A. to help people memorize the earth
B. to help people to learn how to protect the earth
C. to unite all the people on the earth
D. all of the above
| The single business of Henry Thoreau,
during forty odd years of eager activity, was to discover an economy calculated
to provide a satisfying life. His one concern, which gave to his ramblings in
Concord fields a value of high adventure, was to explore the true meaning of
wealth. As he understood the problems of economics, there were three possible
solutions open to him, to exploit himself, to exploit his fellows, or to reduce
the problem to its lowest denominator. The first was quite impossible——to
impris A. the money he makes B. the experience be gains C. the amount he saves D. the books he writes [判断题]杂散电流、雷电和静电不是引起电雷管早爆事故的主要因素。
A.正确 B.错误 [名词解释]宿根花境：
[多选题](多选)影视作品中相连镜头间除因果关系外,主要还存在以下几种关系?( )
A.呼应关系 B.平行关系 C.烘托关系 D.冲突关系 [单项选择]社会要求与（）是制定幼儿园教育目标的主要依据。
A. 幼儿身心发展特征和规律 B. 教育机构 C. 政府 D. 父母 [单项选择]发放《麻醉药品、第一类精神药品运输证明》的部门是（）
A. 省级药品监督管理部门 B. 设区的市级药品监督管理部门 C. 省级卫生行政部门 D. 设区的市级卫生行政部门 [单选题]在缺乏促甲状腺激素的情况下，甲状腺本身可适应碘的供应变化调节甲状腺激素的合成、释放。这种调节方式称为
A.神经调节 B.体液调节 C.自身调节 D.前馈调节 E.反馈调节 [单选题]目前对小肝癌的定位诊断的各种检查方法最好的是
A.B超检查 B.放射性核素肝扫描 C.磁共振成像 D.选择性腹腔动脉或肝动脉造影 E.CT检查 [单项选择]春季调肝，用药当：（）
A. 增酸省甘 B. 省酸增甘 C. 省酸增辛 D. 省酸省咸 E. 省酸收敛 [单选题]常见的生产过程中眼面部伤害主要有（ ）等、
A.异物性眼伤害 B.化学性眼（面)伤 害 C.非电磁辐射眼伤害 D.以上都是 [多选题]下列说法中正确的包括（ ）。
A.分心会削弱说服效果 B.预警会促进态度转变 C.己成为既定事实的态度不易转变 D.自尊水平高的接受者的态度不易转变 [多选题]油系统管路中不能使用（）材料垫片。
A.橡胶垫片； B.耐油青稞纸垫片； C.橡胶石棉垫片； D.铜垫片。 [单项选择]
应急操舵的特点是（） A. ①② B. ①③ C. ① D. ④ [单项选择]企业对现金清查过程中发一的多余现金，未经批准处理之前，应借记“现金”账户，贷记（）账户。
A. 其他业务收入 B. 营业外收入 C. 其他应收款 D. 其他应付款 [单选题]超长、超限货物使用游车时，游车运费按（ ）的运价率和游车标重计费。
A.游车货物 B.所装货物 C.空车 D.主车货物 [填空题]（）通称为痢疾杆菌。
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