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【简答题】
(8分)请运用有关细胞的知识回答下列问题。 答题提示:答题时请从下列供选答案中,选择恰当的标号填空。每个标号只用一次。 供选答案:1DNA分子;20.02g/mL的龙胆紫溶液;31%的那绿染液;4生物膜;5叶绿体;6染色体;7线粒体;8显微镜。 (1)高等植物细胞具有而高等动物细胞没有的细胞结构主要有细胞壁、液泡及_______________。 (2)细胞膜、细胞器膜、核膜等共同构成细胞的_________系统,使细胞内的各部分既相对独立,又相互联系。 (3)为了更好地观察细胞内的结构,常用染色的方法将要观察的对象从接近无色的细胞质中显示出来。观察线粒体时可选用的染色剂是______________;观察染色体时可选用的染色剂是__________________。这两项观察必须借助的工具是_______________。 (4)当细胞进行有丝分裂时,分裂间期内,____________完成复制,然后,染色质缩短变粗、高度螺旋化形成____________。细胞分裂过程所需能量主要由__________提供。
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举一反三
【单选题】You should not belittle his effort but thank him for trying.
A.
make important
B.
make unimportant
C.
make inviting
D.
make appealing
【判断题】When the English colleague has an appointment with you to have a discussion, you should arrive on time as scheduled. During the talk, some others' interruption is permitted, but you should apologize t...
A.
正确
B.
错误
【单选题】You should thank him for the hospitality, ________in a personal note________computer message.
A.
neither, or
B.
either, nor
C.
either, or
D.
neither, nor
【单选题】You should not belittle his effort but thank him for trying.
A.
Make important
B.
Make unimportant
C.
Make inviting
D.
Make appealing
【单选题】小明到香港游玩,可以带( )回深圳
A.
水果和活鸡
B.
商店里买的所有仿真枪
C.
100公斤大米
D.
两盒巧克力饼干
【单选题】下列植物激素中( )的作用是打破种子或芽的休眠。
A.
乙烯
B.
吲哚乙酸
C.
赤霉素
D.
脱落酸
【单选题】You should thank him for his ____. Without it, he couldn't make her laugh. [     ]
A.
an advice
B.
some advice
C.
advices
D.
many advices
【判断题】When the English colleague has an appointment with you to have a discussion, you should arrive on time as scheduled. During the talk, some others' interruption is permitted, but you should aologize to...
A.
正确
B.
错误
【简答题】With respect to the gift, you should write to thank him. (When it comes to)
【单选题】飞机可以利用( )进行俯仰配平。
A.
升降舵或水平安定面
B.
升降舵或方向舵
C.
方向舵或垂直安定面
D.
方向舵
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