解决方案的框架包括:背景综述、()、解决方案和实施及报价等四个模块。
参考答案:问题分析
It was _______ great shock to the world that two Chinese astronauts orbited Earth for five days in ________ Shenzhou VI in October 2005.
A.不填;不填
B.the; the
C.a; the
D.不填;the
致人类腹泻的病原性大肠杆菌有(),(),(),(),()五类.