用长3cm、4cm和7cm的三根小棒不能摆成一个三角形.______.
因为:3+4=7,所以长3cm、4cm和7cm的三根小棒不能摆成一个三角形;
故答案为:正确.
She was so angry at all ______ I was doing ______ she walked out.
A.that; which
B.that; that
C.which; that
D.which; as to
简述沥青针入度的测试步骤。