题目内容

按植物雄性不育类型划分，配子体不育又属于核不育。

查看答案

搜索结果不匹配？点我反馈

更多问题

已知连锁遗传的基因t、r的交换值为20%，

[ A] Bobby ' s birthday
[ B ] Christmas Eve
[ C] New Year' s Day
[ D] Mother' s Day

Questions 14-16 are based on the following interview with Lisa Lynch about the US Labor Department's report on job increase. You now have 15 seconds to read Questions 14-16.
14. What happened to the U. S. job market？
[A] There was a huge increase in new jobs lately.
[B ] About 75,000 new jobs were created last month.
[C] Some 300,000 new workers were employed last year.
[D] There was a growth of new jobs in the past six years.

Perhaps it will be a long while _________Donald comes back from New York. Don't wait
for him.
[A] when
[B]that
[C] since
[D] before