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Did you know that you can help the environment if you buy recyclable products instead of non-recyclable ones? Look for the recycle s  小题1:   – three arrows that make a circle – on the package. Recyclable products are usually made out of things that already have been u 小题2:   . It usually takes less energy to make recycled products than to make new ones. The more energy we save, the b  小题3:  .

Imagine that it's a hot summer day. You put an ice cream on the sidewalk, and it melts. W  小题4:   does this happen? Well, you probably know that the sun causes the ice cream to melt. But you may not know that the sun produces solar energy. Solar energy is a 小题5:    way of saying "energy that comes from the sun." Solar energy can be used to heat homes, buildings, water, a小题6:     to make electricity. Today, more than 200,000 houses in the United States make use of the s 小题7:    energy.Cars are an important part of life for most people. But cars also cause pollution and give out a lot of greenhouse gases into the air. L 小题8:   , there are some cars that are better for the environment. These cars can travel longer on a smaller amount of gasoline. They don't p  小题9:    as much, either. Using these kinds of cars can help reduce the amount of greenhouse gases in the air.

Many things, l 小题10:    computers, TVs, stereos, and VCRs, have special labels on them. The label says "Energy" and has a picture of a star. Products with the ENERGY STAR^® label are made to save energy. Buying products with ENERGY STAR^® labels will help protect the environment.

人体血浆渗透压正确的表达是()

A．280mOsm/kg

B．300mOsm/kg

C．320mOsm/kg

D．540.4mmHg

E．702.5mmHg