高密度氮化硅陶瓷选用哪种烧结方式最好()。
A、常压烧结
B、热压烧结
C、反应烧结
D、气氛烧结
参考答案:B
— Do you have any plan for this summer vacation, Mary?
— Sure, I’ d like to be a volunteer and help to ______ the Central Park.
A.put up
B.call up
C.clean up
D.cheer up
用于分离肠道致病菌的强选择培养基是
A.亚碲酸钾血平板B.SS培养基C.高盐甘露醇平板D.TCBS琼脂平板E.罗琴培养基