科学家最近制造出第112号新元素,其原子的质量数为277,这是迄今已知元素中最重的原子.关于该新元素的下列叙述正确的是( )
A:其原子核内中子数和质子数都是112
B:其原子核内中子数为165,核外电子数为112
C:其原子质量是12C原子质量的277倍
D:其原子质量与12C原子质量之比为277:12
⑴What will you do for your father?____
⑵Is your birthday on October 12th?____
⑶When is your birthday?____
⑷When is April Fool's Day?____
⑸Will you play football with me?____
A. My birthday is on February 21st.
B. It's on April 1st.
C. I'll sing a song for him.
D. Sorry, I can't.
E. Yes, it is.
读图(阴影部分表示黑夜),完成小题。