正确答案: A
苹果受到的重力和桌面对苹果的支持力是一对平衡力
题目:一个苹果静止在水平桌面上,以下说法正确的是
解析:A
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举一反三的答案和解析:
[单选题]某饮料的主要成分为:脂肪、蛋白粉、钾、钙等。该饮料不能为人体补充的营养素是
维生素
[单选题]_________
understand
[单选题]7. —I have a bad headache.—__________
I'm sorry to hear that
[单选题]8.Although they feel tired,________ they still go on working.
/
[单选题]22. What kind of movies do many young people like?
Action movies
解析:22.B【解析】第四句及第六句可说明这一点。
[单选题]24. It is ________ in the shadow of a tree in summer,so many people like to stay there.
cool
解析:24.C【解析】根据常识可知夏天的树荫下比较凉爽。
[单选题]物质在溶解时,常常会使溶液的温度发生改变。下列物质溶于水时,温度无明显变化的是
食盐