清代王锡阐、梅文鼎在科技方面最突出的成就是（）。
参考答案：天文历算
People cannot but feel _____, for they simply cannot understand how he could have made such a stupid mistake.
A．puzzled
B．delighted
C．induced
D．inspired
下述哪几项可使血红蛋白氧离曲线右移（）
A.高碳酸血症
B.酸中毒
C.2，3-二磷酸甘油酸（2，3-DPG）水平增高
D.前列腺素E
E.温度升高
