AB型血者红细胞膜外表面有()
A．C抗原和D抗原
B．D抗原和E抗原
C．A抗原和B抗原
D．A抗原和C抗原
E．A抗原和D抗原
参考答案：C
某班同学要给“希望工程”捐259元钱，请你按汇款单的要求，把钱数填写在横线上。______________整。
Something as simple as_________. some cold water may clear your mind and relieve pressure. [ ]
A. to drink
B. drinking
C. to be drinking
D. drunk
