问题 单项选择题

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

答案

参考答案:B

听力题

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.

单项选择题