下列哪种寄生虫能分泌抗凝素,使被咬附的肠粘膜伤口不易凝血()
A.蛔虫
B.钩虫
C.鞭虫
D.蛲虫
E.姜片虫
参考答案:B
根据短文内容及首字母提示,填写所缺单词,并将答案填写在答题卡相应位置上。
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