探测效率
参考答案:
探测器记录到的粒子数与探测器接受(收)到得粒子数的比值。
The tickets for the show have all been sold out. In other words, the tickets are not ____ now.
A.accurate
B.accessible
C.acceptable
D.available
少儿力量训练应以()为主。
A.动力性练习
B.静力性练习
C.最大力量练习
D.专项训练