问题
单项选择题
下面哪个单位是发光强度的单位？（）
A、流明
B、坎德拉
C、勒克斯
D、熙提
答案
参考答案：B
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下面哪个单位是发光强度的单位？（）
A、流明
B、坎德拉
C、勒克斯
D、熙提
参考答案：B
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| Have you ever been to a party in your pajamas (睡衣)? Many kids in America, Australia, Britain and other western countries have! This is called a sleepover party. First, kids invite some friends. Then they prepare (准备) some games and food. Pizza is popular at their sleepover parties. The guests (客人) arrive in time for supper. They bring their pajamas and sleeping bags. Kids play games and eat delicious food until it's dark. Then they put on their pajamas and the real fun begins. Lots of kids love to tell scary ghost (鬼) stories with the lights off. But not all kids like to be scared. Even hide－and－seek can be a little scary in the dark. When everyone is tired, it's time to get into their sleeping bags and watch a DVD. The kids sleep on the floor in their sleeping bags and they usually don't go to sleep until very late. The next morning everyone is tired. They have breakfast together and then their parents come to pick them up. | ||||||||||
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