67Ga炎症显像时,67Ga成人常用剂量是()
A.37MBq
B.185~370MBq
C.555~740MBq
D.740~925MBq
E.>925MBq
参考答案:B
Europeans always hold their fork in the left hand, ________Americans switch it between their left and right hands.
A.before
B.because
C.while
D.since
字长为7位的无符号二进制整数能表示的十进制整数的数值范围是( )。
A.0~128
B.O~255
C.0~127
D.1~127