人的卵细胞中，正常情况下，染色体的数目应该是 [ ]
A．22+X
B．44+XX
C．44+XY
D．44+X
答案：A
You should _______ when your parents aren't at home.[ ]
A. look yourself after
B. take care for yourself
C. take care yourself
D. take care of yourself
阳明经热盛或气分实热选用（）
A．麻黄汤
B．桂枝汤
C．白虎汤
D．黄连解毒汤
E．大承气汤
