以下哪种英文缩写代表国际实验室认可可合作组织()
A.UKAS
B.ILAC
C.APLAC
D.NATA
E.CNACL
参考答案：B
五个数（或代数式）（-2）3，（-3）2，-42 ，-a2-1 ，0 在数轴上对应的点原点右边的数的个数是[ ]
A．1
B．2
C．3
D．4
She _____ his number in the phone book to make sure that she had got it right.[ ]
A. looked for
B. looked up
C. looked after
D. looked like
