教学关系是静态的、固定的。
参考答案:错
I think every one should know it will be bad for your health to eat _______ food and take _________ exercise.
A.more, less
B.fewer, more
C.less, less
D.little, much
国内快件电话人工查询受理时间应为一周(),每天应不少于()。