妊娠合并糖尿病终止妊娠的时间最好是
A．妊娠36周前B．妊娠36～38周C．妊娠38周后D．妊娠40周E．妊娠41周
参考答案：B
30. _______ from other continents for millions of years, Australia has many plants and animals not found in any other country in the world.
A．Being separated
B．Having separated
C．Having been separated
D．To be separated
基层单位参加地方经济建设，以（）为主。
