题目

Make yourself at home, Lucy. You can take _______ book you would like to read.A. however B. whenever C. whoever D. whatever 答案：【答案】D【解析】考查宾语从句引导词。句意：别客气，Lucy。你想看什么书就拿什么书。A. however无论怎样；B. whenever无论什么时候；C. whoever无论谁；D. whatever无论什么。结合句意可知答案为D。下列能准确反映人类正常精子染色体的是（ ）A. 21+YY B. 22+X C. 21+XY D. 21+XX