插穗是否能成活,关键是看插穗()。
A、是否发芽
B、是否长叶
C、是否生根
D、是否长青
参考答案:C
—You see, “Food Safety” receives thousands of Internet hits a day.
—Yes, it becomes one of the _________ topics(话题) these days.
A.uninteresting
B.hot
C.most uninteresting
D.hottest
气动系统安装完成后,应采用干燥的()进行彻底吹扫。
A、空气
B、压缩空气
C、氧气