下面哪些编码是前缀码?[tex=7.714x1.214]hGS5xViWBk7oy2NhbyOdmFVFxb0i/een+hLJvFTKkIXMjeVF2Imk6nMSV/wRxIopyvxbA2K2LDmD7n5hUkwqjw==[/tex]

Wordsworth’s Prelude as lso een alled ____.

She has always ____her neighbors for the past twenty years. A: een fed up with B: een on good terms with C: got around to D: gone along with

—Have you ever _______ an amusement park? —Yes, I have. I ______ Fun Times Amusement Park last year. A: een to; have gone to B: gone to; have been to C: go to; went to D: een to; went to

If it _____ fine tomorrow, we will have a football match. A: is B: was C: eing D: een

Have they accepted the invitation? / Has the invitation ................ by them A: accepted B: accept C: een accepted

Wechat is widely _____ in our daily life. A: use B: used C: using D: een used

已知一中缀表达式为:6*2*(7+5)+2*(6+9/3),则等值的后缀表达式是( )。 A: 6 2 * 7 5 + * 2 6 9 3 / + * + B: 6 2 7 5 + * * 2 6 9 3 / + * + C: 6 2 * 7 5 + * 9 3 / 6 + 2 * + D: 6 2 7 5 + * * 2 6 9 + 3 / * +

【单选题】Cu 的基态电子组态为 。 A. 1s 2 2s 2 2p 6 3s 2 3p 6 3d 9 4s 2 B. 1s 2 2s 2 2p 6 3s 2 3p 6 3d 10 4s 1 C. 1s 2 2s 2 2p 6 3s 2 3p 6 3d 5 4s 1 D. 1s 2 2s 2 2p 6 3s 2 3p 6 3d 6 4s 2

已知2阶行列式=6,则= A: -6 B: -2 C: 6 D: 2