She is ____________ engineer. [ ]
A. a
B. an
C. the
答案:B
计算:(1)(6ab4)2÷(-2ab3)•(-\frac{1}{2}abc2)
(2)(t+1)(t-5)-t2
(3)(a2b3-a2b2)÷(ab)2
(4)(5a-b2)2
(5)(a+2b-3)(a-2b+3)(6)(x+2)2(x-2)2.
Some people will love music more than anything else while others won't be____it.
A.into
B.on
C.against
D.beyond