26.The time is drawing near food raised in space will directly benefit humans below.
A.where B.when C.whether D.why
25.On snowy days, you have to drive very to avoid traffic accidents.
A.cautiously B.neatly C.smoothly D.properly
24. alone in the large house, the little boy had to learn to survive by himself.
A.To leave B.Leaving C.Left D.Being left
23.Play, often seen as activity for kids, is still important in development of teenagers.
A.the; the B.an; the C.an; 不填 D.the; 不填
22.A big step to strengthen China’s health care systems since we launched an effort in 2008.
A.has been taken B.is being taken
C.was taken D.had been taken
第一节:单项填空(共15小题,每小题1分,满分15分)
从A、B、C、D四个选项中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。
21.---Let me help you cross the street.
--- ! I’m not that old.
A.Take your time B.No way
C.Come on D.Go ahead
48.(生物技术实践8分)果酒的制作离不开酵母菌。请回答下列问题:
(1)在实际酿酒过程中,一般先让酵母菌在 条件下进行繁殖,然后充分发酵,再通过 的方法获得果酒。
(2)人工培养酵母菌,首先需要获得纯净的酵母菌菌种。
基本程序:①配制培养基→②接种→③培养→④观察记录→⑤纯化培养。
①配制培养基时,原料称量溶解之后,要进行 ,然后分装包扎并灭菌,常用的灭菌方法是 。
②平板划线是常用的接种方法,划线之前要对接种环进行灭菌,原因是 。
(3)将酵母细胞固定化之后,与传统的发酵相比具有哪些优点?请列举两条。
; 。
湖北省互联网违法和不良信息举报平台 | 网上有害信息举报专区 | 电信诈骗举报专区 | 涉历史虚无主义有害信息举报专区 | 涉企侵权举报专区
违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com