反渗透膜元件一般能用几年？

阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。

If you feel stressed by responsibilities at work, you should take a step back and identify (识别) those of   61  (great)and less importance. Then, handle the most important tasks first so you’ll feel a real sense of   62  (achieve). Leaving the less important things until tomorrow   63  (be) often acceptable.

Most of us are more focused   64   our tasks in the morning than we are later in the day. So, get an early start and try to be as productive   65   possible before lunch. This will give you the confidence you need to get you through the afternoon and go home feeling accomplished.

Recent   66  (study) show that we are far more productive at work if we take short breaks   67  (regular). Give your body and brain a rest by stepping outside for   68   while, exercising, or dong something you enjoy.

If you find something you love doing outside of the office, you’ll be less likely   69  (bring) your work home. It could be anything-gardening, cooking, music, sports—but whatever it is,   70  (make) sure it’s a relief from daily stress rather than another thing to worry about.

69（）

We experience different forms of the Sun’s energy every day. We can see its light and feel its warmth. The Sun is the major source of energy for our planet. It causes the evaporation (蒸发) of water from the oceans and lakes. Sunlight also provides the energy used by green plants to make their own food. These green plants then provide food for all organisms(生物) on the Earth.

Much of the energy that comes from the Sun never reaches the Earth’s surface. It is either reflected or absorbed by the gases in the upper atmosphere. Of the energy that reaches the lower atmosphere,30% is reflected by clouds or the Earth’s surface. The remaining 70% warms the surface of the planet, causes water to evaporate, and provides energy for the water cycle and weather. Only a tiny part, approximately 0.023%, is actually used by green plants to produce food.

Many gases found in the atmosphere actually reflect heat energy escaping from the Earth’s surface back to the Earth. These gases act like the glass of a greenhouse in that they allow energy from the Sun to enter but prevent energy from leaving. They are therefore called greenhouse gases.

When sunlight strikes an object, some of the energy is absorbed and some is reflected. The amount reflected depends on the surface. For example, you’ve probably noticed how bright snow is when sunlight falls on it. Snow reflects most of the energy from the Sun, so it contributes to the low temperatures of winter. Dark-coloured surfaces, such as dark soil or forest, absorb more energy and help warm the surrounding air.

小题1:According to the passage, the root( 根本的) cause for weather changes on the Earth is         .

A．the atmosphere surrounding the Earth

B．water from oceans and lakes

C．energy from the Sun

D．greenhouse gases in the sky小题2:Only a small part of the Sun’s energy reaches the Earth’s surface because most of it is         .

A．absorbed by the clouds in the lower atmosphere

B．reflected by the gases in the upper atmosphere

C．lost in the upper and lower atmosphere

D．used to evaporate water from the oceans and lakes小题3:We learn from the passage that         .

A．all living things on the Earth depend on the Sun for their food

B．a forest looks dark in winter because it absorbs solar energy

C．only 0.023% of the energy from the Sun is made use of on the Earth

D．greenhouse gases allow heat energy to escape from the Earth’s surface

省公司生产技术部门完成省公司综合停电检修计划的汇总、平衡和批复的时间是（）。

A.9月30日前

B.10月30日前

C.11月15日前

D.12月15日前

下列实验中，反应速率加快属于由催化剂引起的是

A．氯化钠与浓硫酸混合加热后，撒入二氧化锰即放出氯气

B．过氧化氢中加入几滴氯化铁溶液，可较快放出气体

C．在木炭粉中加入微量氯酸钾，燃烧时极为剧烈

D．用锌与稀硫酸反应制备氢气时，加入少量硫酸铜加快反应

下列哪一种情况商场须承担缔约过失责任？（）

A.甲故意隐瞒手表的内在瑕疵而将该手表卖与乙，乙发现后撤销了该手表买卖合同，乙因此遭受路费损失及误工损失100元

B.商场出售的商品不合格，顾客要求退货的

C.商场的保安人员怀疑某女士盗窃商场内出售的货物，而对该女士非法搜身

D.顾客要购买摆放在商场橱窗内的展示品，而商场以该展示品不出售而给以拒绝的