下列运算正确的是
A.a3a4=a12
B.a6÷a3=a2
C.2a﹣3a=﹣a
D.(a﹣2)2=a2﹣4
答案:C
—Lily's ideas are _______ yours.
—I know. She never agrees with me. [ ]
A. the same as
B. the same like
C. different from
D. different with
针对工程问题,可以采取技术措施、组织和管理措施、经济措施及( )。
A.合同措施
B.施工措施
C.控制措施
D.法律措施