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（1）若图甲是癌细胞的细胞膜，则膜上含量较正常细胞减少的物质是[ ] 。
（2）若图甲是线粒体膜，b和c过程运输的气体分别是 。b、c运输方式符合图 所表示的物质运输曲线。
（3）若图甲表示人体红细胞膜，则表示Na＋、K＋运输的分别是图中 。Na＋、K＋的运输方式符合图 所示曲线。
（4）已知红细胞吸收葡萄糖是协助扩散，而有人认为小肠上皮细胞以主动运输的方式吸收葡萄糖，请设计实验加以确定。
①实验步骤：
第一步：取甲、乙两组生理状况相同的小肠上皮细胞，放入适宜浓度的含有葡萄糖的培养液中。
第二步：甲组细胞给予正常的呼吸条件， 。
第三步： 。
②预测实验结果并分析：
a．若甲、乙两组细胞对葡萄糖的吸收速率基本相同，则 。
b． 。 查看习题详情和答案>>
书面表达
同学们，我们身边有很多助人为乐的同学，他们的事例值得我们学习。请根据下面表格信息给学校英文报写一篇短文，谈谈身边的好人好事，号召大家向他们学习。
要求：1．参考表格信息，可适当发挥；
2．语句通顺，意思连贯，书写工整。
3．文中不得出现真实地名和姓名；
4．词数：60－80词。(开头和结尾已给出，但不计入总词数)
Dear Editor，
In our school, some students are always thinking more of others and are ready to help them．I'm moved deeply．Here is what they usually do．
Liu Na is a very good student．
______________________________
I hope everyone can learn from them and do something for others．
根据对话内容，在空白处填写适当的话语(话语可以是一个句子，也可以是一个短语或一个词)，使对话完整。
Zhao Dan：Hi, Sun Yang! A nice day, isn't it?
Sun Yang：Yeah! 1 , Zhao Dan?
Zhao Dan：I'm going to play tennis．
Sun Yang：Tennis? Are you 2 in tennis?
Zhao Dan：Yes．I have been playing it since I watched Li Na play tennis on TV for the first time．Sun Yang： 3 ?
Zhao Dan：She is my favorite sports star．She won the tennis championship in France in June．
Sun Yang：Oh, maybe that's why more and more people love this sport．
Zhao Dan：You’re right．One more thing, she is also good at English．She can 4 foreigners freely．
Sun Yang：How cool she is! I want lo learn to play tennis, too．
Zhao Dan：No problem! My uncle is a tennis coach．He can coach us．
Sun Yang：May I 5 you today?
Zhao Dan：Of course．Let's go．
p_ _nt sp_ _k p_ _n_
sw_m_ _r? ch_ldr_n k_d s_ _mer? c_ _p dr_m
tr_mp_t? vi_l_n m_s_c_an
m_ _be? t_lk?
查看习题详情和答案>>补全对话。根据对话内容，从右边方框中选出适当的选项补全对话。
并将选项的编号字母依次填在答题卡的相应位置。 （共 4 小题，每小题 1分；计 4 分）
David: Excuse me.
Waitress: Yes? 【小题1】
David: I ordered my dish half an hour ago, but I haven’t got it yet.
Waitress: 【小题2】 I’m going to see if it’s ready.
(The waitress comes back from the kitchen. )
David: Sir, I’ve just checked with the kitchen and your food will come up next. 【小题3】
David: Thank you.
Waitress: Please enjoy your food. Again, I’m sorry that I have kept you waiting so long.
David: 【小题4】
| A．Oh, here it comes. |
| B．It doesn’t matter. |
| C．I’m sorry for that. |
| D．What can I do for you? |