燃油表用于指示油箱内部的存油量，注意：指零时表示没有油了。
参考答案：对
市盈率通常用于考察股票的内在价值，多为长期投资者所重视；市净率通常用于考察股票的供求状况，更为短期投资者所关注。（）
Not until they left school how much their teachers loved them and helped them.
A．they realized
B．did they realize
C．had they realized
D．they would realize
