CCS是表示（）船规的符号。
A.法国
B.中国
C.德国
参考答案：B
The one concern for parents and students is ______ if the student pursues their university education in a foreign country, the student will not have the opportunity to establish social contacts in China.
A．what
B．that
C．whether
D．/
核医学早期显像的直线扫描机诞生于1951年，发明者是（）
A.Anger
B.Fermi
C.Yalow
D.DavidKohl
E.Cassen
