MDFT干预应该是多方面的。
参考答案:对
做10节底面直径20厘米,长1米的烟囱,至少需要( )平方分米的铁皮。
He never tells lies, so he is _____ honest boy. It's not good to be _____ dishonest one. [ ]
A. a, an
B. an , a
C. /, a
D. an, the