下列运算正确的是 ( )
A.(a3)4=a7
B.a6÷a3=a2
C.(m+n)2=m2+n2
D.a3.a4=a7
答案:D
解:,故选D。
Any habit ______ slows down your silent reading to the speed at which you speak, or read aloud, is inefficient.
A.which
B./
C.that
D.who
反映肝脏合成能力的是()
A.ALT
B.MAO
C.γ-GT
D.CHE
E.AMY