可以在光学显微镜下看到非姐妹染色单体之间出现交叉是在()。
A. 细线期
B. 偶线期
C. 粗线期
D. 双线期
E. 终变期
减数分裂中同源染色体形成二价体是在()。
A. 细线期
B. 偶线期
C. 粗线期
D. 双线期
E. 终变期
根据录音，选择合适的答案（） 查看材料
A. They are not qualified for most of the jobs．
B. They can hardly get any job offer．
C. They have high expectations of jobs．
D. They don"t know how to apply for jobs．
根据录音，选择合适的答案（） 查看材料
A. They should pay a little money to attend．
B. Only important ones should be invited．
C. They need to donate money for the anniversary．
D. They have to give presentations．
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