国家和地方重大科研项目承担单位不用为毕业生办理社会保险。
参考答案：错
There _______ an important and wonderful concert at the theatre this Sunday. [ ]
A. is going to have
B. is going to having
C. is having
D. is going to be
性腺是指（）.
A、睾丸和卵巢
B、肾脏
C、生殖器
