Shortly after being admitted to the coronary care unit with an acute myocardial infarction (MI), a client reports midsternal chest pain radiating down the left arm. The nurse notices that the client is restless and slightly diaphoretic, and measures a temperature of 99. 6°F (37.6℃), a heart rate of 102 beats/minute; regular, slightly labored respirations at 26 breaths/minute; and a blood pressure of 150/90mmHg. Which nursing diagnosis takes highest priority ？（）

A．Risk for imbalanced body temperature.

B．Decreased cardiac output.

C．Anxiety.

D．Acute pain.

人类的生殖细胞、体细胞和受精卵中分别含有多少个DNA分子

A．23 46 23

B．46 46 23

C．23 46 46

D．23 23 23