单项选择题

Why is blinking important

A．It helps the eyes absorb eye drops.
B．It helps to keep the eyes moist.
C．It improves a person’s concentration.
D．It prevents a buildup of chemicals in the eyes.
<上一题 目录 下一题>
热门 试题

问答题
[听力原文]Apples Apples are the second most valuable fruit crop in the United States, after oranges. Autumn is a time when fresh apples are everywhere. They are not native to the country. Research shows that apples came from Central Asia. But they are believed to have been grown in America since the early sixteen hundreds. Washington State, in the Pacific Northwest, produces the country’s biggest apple crop. New York and Michigan are also big producers. Among nations, China is the biggest grower followed by the United States and Turkey. This year, American growers expect to harvest nearly four thousand five hundred million kilograms of apples. That is a little less than last year’s record harvest. Apples are a member of the rose family. Apples come in reds, greens and yellows. About two thousand five hundred kinds grow in the United States. Three times that number are grown around the world. In the United States, three fourths of apples are eaten fresh. Some are made into sweet foods like apple pie. The rest are processed to make products such as apple juice, apple cider, apple sauce and vinegar.
单项选择题
When the nurse took his temperature, it was two degrees above ______.
A．average
B．ordinary
C．regular
D．normal
相关试题